Samsung HDTV is superior/ update- sorry I said that.
923972
Before buying this set, I had already checked out a number of HD sets by going to many of the typical big brick and mortar stores, and found the Samsung to be a superior set.  When the price fit my budget, I pounced, and have not been sorry at all.  The DLP engine is really worry free so far, and the picture is beautiful.  My living room is a bit dim in the first place but we have not had any problems seeing the image during the day or with lights on in the room.  The color is rich and bright, and the 720p resolution is fantastic.  I had previously looked at a Sony rear projection side by side, but the Samsung set was superior in color, contrast, brightness and apparent resolution.  LCD really does produce the "Screendoor" effect, but this DLP engine does away with that.  Images are smooth, resolution is crisp, and the picture is fantastic.  My standard DVD player looks great on this set without doing any upconverting.  And broadcast HD signals- well, I just watched the Steelers' first preseason game in HD- WOW!  Get this set!

UPDATE (sept 19th 2010):  Three years into owning this set- I am now buying my second lamp for this god-forsaken device.  I am very angry that I have paid for two more lamps and Samsung is not wining any loyalty from me.  I recommend not buying a rear projection TV as the projector lamp is truly an achille's heel.

SECOND UPDATE:  Jan, 2011  After the initial problems with the lamp, then the DLP engine started producing white spots on the screen, permanent ones.  Then flickering black dots soon followed, also permanent.  I did some hunting on the interwebzes and discovered that the White Dot problem on these TVs is a known issue, and that Samsung had replaced the engines on these TVs FOR FREE! for myriad customers who had the same White Dot issue.  I called Samsung customer care (1800 Samsung) and they didn't even bat an eyelash.  Scheduled a repairman right away.  He is here right now replacing the engine! AT NO COST TO ME!!!!  Samsung really got this one right.  They have rescued themselves in my view- this was the right thing to do and a good customer experience.  BUT... if this was a know issue there should have been a contact initiated about either a recall or otherwise.  but feel pretty good about being able to resolve it without extra dough.
327082
[EDIT] TV is great after  1 1/2 years.

Picture and functionality: This tv is beautiful. Looks great with the Xbox 360, with Game Mode on. Extremely convenient that it saves the settings for each picture mode, so you can set it and forget it. The speakers actually sound really good, but it's in a bedroom that is about 15'x15', so I can't comment about how they sound in a larger family room. But what I do know is that most hdtv's don't have great sound to begin with, considering they're so slim these days. But who doesn't know/expect that? We all use surround sound or sound bars.

This tv also has a digital optical sound output, so it's simple to hook it up to surround sound, if you want to use the 2 hdmi inputs for other devices. The setup was very easy. When you know what you're getting, this tv is perfect. It's clearly listed as having 2 hdmi inputs and no pc input. As with most plasmas you get a very noticeable reflection in a room with lighting, so a darker environment is best for this screen. The Media Player Connectshare is an awesome feature! I can hook my 1TB External HDD to it and play blu-rays right from there- Plug and Play.

Couldn't be happier with this tv so far, now hopefully it lasts. You can extend the warranty by 3 months by registering it with Samsung. Overall, the picture is stunning when playing Call of Duty: Blacks Ops 2. I can't test this for HDTV quality because I don't have the service right now. [EDIT] It's a great picture with HDTV service. No complaints. Colors look real, blacks are black.

Blu-Ray movies look great. Great color, no motion blur, seems like a perfect image.

Physically: The tv looks great, it's very sleek, and slim. I may decide to mount it, considering it's thin build. I mounted it with a mount also purchased from Amazon. Painless and all the wires are hidden in the wall. FYI, the hdmi jacks face backwards, away from the tv, so it is difficult to reach behind the tv to switch around any cables. It'd be nice if the jacks were sticking out of the side of the tv, but I manage and it doesn't really bother me.

Purchase: There was no way I was waiting in any lines on Black Friday. I went to Best Buy and Walmart Thursday night, just to check out the frenzy, and I am happy I decided to get a way better deal for this huge tv, online. The scheduled delivery made it very convenient as well. The delivery man was respectful and prompt. As a student, the Amazon Prime Student Membership really hooked me up with the free 2-day shipping.  Thanks Amazon!
462255
Got my shipment 6 days ago, really happy with the picture, sound, DLNA, wiselink pro, infolink and build in content features. One serious problem happened to my TV when I upgraded the firmware to August 10 release.  The upgrade was successful, but all build in content disappeared.  A Samsung service tech came to my house and told me there is a microchip damaged and need to bring the TV back to their shop to repair.  It really scares me.  This is not kind of quality I expected from Samsung, and whatelse can be wrong.  Time will tell.  Anybody has similar issue?

Just to follow up with my situation.  I called Amazon customer support line and described my situation.  The customer support rep. quickly placed a replacement order for me.  I received the new TV 4 days later.  They will come to pick up the old one today.  I checked Samsung web site, the August 10 firmware is no longer available.  New firmware is dated Oct. 21.  I have not seen any problem with new TV, so no upgrade is necessary.  A+ goes to Amazon's customer service.
2650428
it sez it is putting out 1080p and my tv thinks it;s getting 1080 p but I think it is at best 720p. ...just saying. but definately improved the HD somewhat.
2410121
*********UPDATE*************

I rated the TV 5 stars in week one see below (week one review), here is my update 5 months later...  1 star and would go less if I could. Not pretty!

Updated review (STAY AWAY):

I bought this TV and at first I loved it great picture and sound... The best actually! However in less than a month the TV got so hot it burnt the anti-glare off spots on the front. I reported the issue and after 4 months I got Pioneer to get a Pioneer authorized dealer come out and look at it. They stated "this is definitely a manufacturing defect" and they submitted the claim to Pioneer.
Pioneer stated "We've tested EVERY POSSIBLE scenario with our TV and it is impossible for the TV to have a defect with anti-glare, the authorized dealer means nothing". In turn I have a very expense TV with spots of anti-glare burn holes on/in it.
STAY away!!!!!!!!!!!!

They're going out of business for a reason. They sell you on paying for the high quality and top notch performance, but if you do get an issue they will state you are the reason and you're left holding the bag. Get a Panasonic or a SAMSUNG LED.

Week one review:

I wanted a large screen for my big room (52 or greater) so I looked at it two ways , I could look at buying a TV that would be sufficient/average quality and picture and save some dough or invest a few hundred more and get a top of the line TV.
I researched endless hours online and by talking to different electronic people (tweeter, Authorized TV repair shop technicians, not big box employees) and after doing extensive research the answer was pretty clear.
The pioneer won in every category picture, quality, etc. and when I started asking all of the above people every one of them had a Pioneer (Elite or 60X0) except one who had a panny.
I got my 6020 this week and the thing is awesome it blows my Samsung LCD away. The LCD even with 120 gets blurry during sports and fast action, the colors are overly bright/driven sometimes. Don't get me wrong the Samsung LCD is nice and far better than most, but it couldn't even hold a water bottle for the 6020.
If you don't want to play with settings for room brightness, color, or sound just set the TV to auto and let it go as it will out perform on its own what the best fiddler can do with any of the others.
I did look at the 800 and the 850, but after doing using the monster picture DVD (several images with random colors held for 10-15 seconds so you can few the same picture on each TV) it was pretty clear as to why the couple hundred buck investment needed to be made. The 6020 shows multiple levels of back and color shades. When they state about the blacks and the difference they make have a vendor show you a similar test. Also there is a domino test where you can see different shades of blacks as the domino picture fades away on a plasma you see them all (and on the 6020 you see more clarity than the panny) and on an LCD you see half as the LCD overshoots the blacks so bad they get saturated.

In summary I can say that I've owned the 6020 for about a week and I'm some glad I spend the extra and got the Pioneer it was WAY worth it. If you're on the fence don't be as your going to have it for several years and use it more than anything else in your home so short changing yourself will only make you regret your decision. Go with the leader this year and for the past several the quality will blow you away.
3165270
I too received this TV as a replacement for my Samsung DLP which had a couple of boards go out.  The fact that Samsung replaced it with this beautiful work of art says something.  First, the touch of red is hardly noticeable.  It's very easy to set up, turn it on and it asks if you are in a showroom or home and a couple of other questions(can't remember, took about 30 seconds) Ran the THX optimizer found on lucasfilm DVD's(star wars and such) and the only had to change the green level 2 notch's.  The default settings are spot on but yet it offers at least 20 other advanced settings that any videophile will love.(way over my head and I'm technically literate)  The picture with a standard dvd player is fantastic, I'm pretty sure the tv does some up converting but I could be making that up, no artifacts, or ghosting.  The black levels are very, very, nice and solid. I use hulu(hdmi from the computer) and netflix on demand through an xbox (no cable or sat) and the picture couldn't be better.  My only 1080p source is the xbox 360 and it works just as well as everything else, 6ms for gaming isn't slow, I'm not dying any more than usual (COD4,WAW)in fact I might be doing a little better.  Now that my field of view is  half of the battlefield 46inches @ a 9 ft viewing distance is BIG. My only complaint so far is with Anynet, I had never used it before last week and it's terribly slow.  Oh well, if that's my only problem I think everything will be just fine.

Updated 12/19/10:  Still going strong.  The only thing I've found is I have to switch between dynamic and standard mode more day/night). I'm pretty sure it just needs to be adjusted again; I have only adjusted it once.  I have also had a chance to compare my TV with my friends sets and I have to say I like mine more.  One friend has a plasma(also a Samsung) It's a nice TV and the blacks are fantastic my only complaint is that it generates A LOT of heat and my eyes feel tired after watching/playing for a short time (I'm sure it needs adjustment but my friend just doesn't understand :)  I hear Plasmas don't have screen lag Per Se but with the 360 aim sensitivity set to what mine is the plasma definitely lags. I think Plasmas would do well in a larger less intimate space than what I'm used to.  The other friend has a monstrous 65" or 68" Mitsubishi DLP that oddly enough was his replacement (extended warranty=new TV after 4 years).  I like it. The image is nice but I'm glad I won't have to buy a bulb for it.  It too requires a higher aim sensitivity than the LCD. All in all I've been very happy with this TV, the image is stellar.  I would ignore the hype over 120hz vs 240hz (heck even 720p vs 1080p for that matter) and 3D well...............not interested until the tech evolves.  Do Your Own Due Diligence.
1293989
This tv was purchased from Amazon to replace a Samsung P58B860 bought at the end of the season 2 years ago (so it was released 3 years ago and Samsung's best Plasma at the time).  LOVED that tv until my 3 year old daughter somehow cracked the screen.  Because I needed a tv fairly quickly (I couldn't watch the 27" tube from the bedroom for long), I didn't spend as much time researching as with the previous set, but I also knew a lot more going into it this time.

The clincher for me was viewing a 55" GT50 against a 55" Samsung 8000 with the same settings and the same Blu-ray on the screen simultaneously.  Thanks Best Buy for letting me use you for that!  Side by side, the Panasonic was clearly the winner, by a ton.  Blacker blacks, more realistic colors, etc, etc.  Now I know this isn't a GT50, but it wasn't out yet in a 60" and the differences on paper seem to be negligible to me.  If Panasonic's #2 is better than Samsung's #1, then I figured Panasonic's #3 was good enough - and the price didn't hurt as much either.

As a note, sports aren't on my tv much - but just about everything else is including a lot of blu-ray and dvd movies.

The common negatives in the other reviews are things I haven't noticed - no noticable buzz, 3 hdmi inputs don't matter to me as everything goes though a Denon receiver so I only need 1.  For me, the noticable downsides are that there are considerable dark spots if I stop right in front of the tv at which point I'm looking a little down on it (viewing at a downward angle).  Not a big deal.  Also, the "improvements" in brightness make this too bright for my taste and I had to make a lot of adjustments to make it not look like an LCD with good blacks - and I can't stand the way LCD's generally look especially with cartoons which get a lot of play in my house - I prefer realistic to the surreal look of some blu-rays on an LCD.  If I hadn't been able to 'adjust away' the out-of-the-box picture, this tv would have most likely gone back.

I started with CNet review settings and backed the sharpness back to zero to get it closer to my taste.  Turning off the motion smoother and all other processing enhancements made the final difference.  I still need to play with some of the color adjustments in the pro settings, but I can't see changing them much from where they are.  I don't remember the calibration of my Samsung making such a huge difference and I'd attribute this again to the brightness.

After a couple of weeks of viewing, I'm now convinced this is better than my old Samsung - but not exponentially.  This week, the 60" GT50 just showed up as available, but I think I saved about $500 for a very comparable tv.  Now I just need to figure out to keep the kids away from it and I'm sure I can stomach a 60" piece of lexan!  Hope this is helpful.
3980356
I had purchased Samsung UN40EH5300 smart TV almost a month ago. Initially had some buffering problem for the youtube app, but all the other apps worked fine. Yesterday the tv hanged, and was not opening any app saying not connected to internet ("ERROR_MODEL_BIND"). I had 2 laptops and a smartphone connected to internet without any problem, and tried with LAN connection too! Nothing worked. Called up Amazon support who were very helpful in diagnosing and then they forwarded to Samsung tech support who just said the problem is with internet provider. I decided to return the Samsung TV.

Now i had to have a new TV immediately. Thought of buying higher 40" model from Samsung/LG (with dual core processors). Headed to Frys today. There, they took me to compare Samsung 40" 5300 and Sony40" KDL 450A with two USB sticks. USB sticks had some pictures, including the one multiple shades of each color. The photos looked stunningly accurate in Sony, but was not accurate in Samsung. for the different shades, samsung seemed to have color blindness while the Sony showed the colors differently! Wow! They suggested i but a blue ray player + Sony KDL450A so that can get good TV + dedicated player for streaming/media. I had not thought about that! Said lemme do some research and get back! by 6:30 in the evening today i went back and bought Sony KDL450A(Frys have a good discount on this model, ~50$ less than next best price in the internet) + Sony BDP-S5100 blue ray player. Was very happy that i got a good deal.

Came home, hooked up the new TV. My kid was watching Pingu on Samsung 5300 (through youtube, it occasionally works now), and I put Pingu on the new Sony TV through Sony blue ray player's youtube app. Lo!! The picture looked washed on Sony! There were pixelations here and there. Samsung had better smooth picture, while Sony's was grainy and washed. I spent more than an hour to change settings on the Sony TV and blue ray player to get a better picture! nothing worked. Tried different videos on both the TVs - a movie, music video etc. Everywhere, Sony's clarity was bad compared to Samsungs! Sony had better sharpness, but looks like the video processing engine is not good in Sony! So it will be going back to Frys soon. Samsung is returning to Amazon tomorrow. Now I am looking at Vizio M401i-A3 40". Do comment if you people have any suggestions for a good VFM 40" TV (preferably with smart capabilities)
1876
ORIGINAL REVIEW:

My Optoma HD66 was delivered on December 15th with two green stickers on the box displaying the NVIDIA 3D Vision Ready certification.  So for the gamers out there, the newest version of HD66 has finally been updated.  OK, since I don't game I can only write about the movie experience.  First, I ordered the Vivitek D510 for its low price and the fact I only needed it for business presentations.  After trying it out, its 800x600 native resolution was not that crisp for small text reading on a 50" screen.  Also, when experimenting with cable TV or DVD playback, its picture detail and color accuracy was very poor.  Since I didn't want to spend a lot more money and after doing further research, I decided to try the HD66 because it was entry level high definition with 2500 lumens which is useful for business presentations.

Optoma HD66 works as advertised.  It's a compact machine and with some tweaking with the color adjustments, it gave a very good and crisp picture quality.  A good test came by streaming a movie from VUDU which can display all three versions in picture formats: 1080 HDX, 720 HD and SD (standard definition).  SD was clean and clear but lacking the detail and contrast depth of HD.  720 HD was much better than SD and approached the HD66's native resolution of 1280x800; but VUDU's 1080 HDX had superb detail and color saturation even though the Optoma was down scaling the resolution.  While I was very satisfied with the HD66 picture quality, it DOES NOT equal my Samsung HD flat screen's vivid picture.  For buyers looking for a projector that can display a HD flat screen experience, I am convinced that the 1080p projectors, like Optoma's HD20, is the way to go and well worth the extra cost.

****************************************************************************************************************************

UPDATE: JANUARY 22, 2014

So, after 3-years of owning the Optoma HD66, my projected picture is beginning to look like the Milky Way.  Hundreds of stars shining on my screen.  I see that I'm not alone based on the numerous complaints within the Amazon reviews.  It's too bad because the picture quality without the stars was very good for the price.  But there you go, you get what you pay for.  And for that reason, I have lowered my rating on the Optoma HD66 from four stars to two.  Actually, I should give it a hundred stars because that's whats being projected, and I'll be certain to replace the Optoma with a more reliable brand.
248620
It's been about 4 years of off and on decision making on getting a TV. I've had 10's of tv's over the past 4 years. Also PC monitors including the latest Asus 9ms input lag one.

Every other TV or Monitor I've had either had horrible backlight bleed, or IPS glow which is a pain to view for movies. Every Samsung TV I've had all produced significant amounts of ghosting which is unbearable. I've had a few of them too, including the 32" 5500 series. The LG LM6200 I had was the last one I just had before it broke.

Now with that LG gone. It was time to focus on what I wanted in a TV. Deep, deep black levels similar to a plasma. Neutral colors, nothing over saturated. No IPS glow, so IPS was out of question, a 32" as I would be using it as a PC monitor/ Gaming Console/ Movie watching.

This Sony W650 is Incredible. It has less input lag than the LG IPS it replaced IMO. Now, IPS is known for low input lag, but this Sony VA panel definitely feels less laggy. Not only that, but the black levels are far better. The brightness is great as well. So great that I have it turned down all the way to 0 on the backlight. I'm in a completely dark room though, with just one light bulb. I was hoping to find a TV with a glass/ glossy screen with no Anti Glare coating. This TV does however uses a AG coating, but it's semi glossy. Similar to the LG. With that being said, web text is clear. I believe this tv is Chroma? 4:4:4 subsampling. Meaning, red text on a black background doesn't blur or have problems viewing. Colors are very neutral too. The tv sits pretty low too, so great as a PC monitor.

Now, a little bit about the Smart features. It has A LOT! Vimeo, Amazon, and many more which I didn't really bother to remember. If you have a question about one, leave a comment and I'll let you know if it's available on the tv.

The Optical out, does provide Dolby Digital 5.1 surround sound. I don't know what the speakers on the TV sound like as I use my Home Theater speakers so I can't comment on those, nor the USB/movie function. The Bezel is very minimal. About half and inch wide across the top and sides. The bottom bezel is about 1 inch. The majority of the top half of the TV is very slim, just as slim as the bezel. The bottom half is where it gets bulky in the back so make sure the location for this tv will have room.

Now onto what I don't like about the TV.
The Stand. It doesn't swivel, or tilt. It's just there holding the tv up. So when I get out of my desk to lay in bed, I can't just swivel the tv to point at my location. I have to turn the entire stand too, to where it needs to point at. Thus causing me to move my keyboard, mouse out into the middle of the desk. Just a small issue, but that's just my dislike. The tv has color shifting or so when I am viewing it from a standing position. It's not bad, but noticeable. The remote sensor is down at the bottom near the Sony logo. I put my keyboard on the tv stand to give a degree of angle to type a bit more comfortable. Sometimes I forget to move it back when I go to bed and then can't use the remote as the keyboard ends up blocking the sensor.

All in all. This is hands down the best tv so far that I bought that fits all my needs. Gaming, and watching movies with an outstanding picture. Minimal input lag, very minimal ghosting/glare compared to the Samsung tv's. BUT not as perfect as TN/IPS/Plasma glare which isn't noticeable on those three imo. I hope this review helped a bit in your decision.

If you have any questions, just comment back on this review and I'll try my best to help.
2791526
Televisions are becoming more and more like computers. What is top of the line this year is obsolete two years from now. I keep hearing about 4K HD, but I'll have to see it to believe that I need it. I am not a videophile, but I appreciate a good image and never watch SD when HD is available (like my daughter). I like Blu Ray and make sure I use them if possible. All that said, the image on this unit is absolutely stunning. The small bezel has been discussed here many times, but it can't be stressed how much of a difference it makes. I like the "Looking through a window" analogy I saw in one review. My daughter and girlfriend both keep shaking their heads when we watch BluRay on it. My couch allows us to sit 10' from the screen. That seems pretty perfect to me.

Smart Hub is interesting, but I don't use it much. Most of what it does, is duplicated by other media devices I already own.
  - It can be slow
  - Netflix App is not as good as the Apple TV
  - Can't figure out how to fast forward in the "Explore 3D" app. It only skips 30 seconds and then has to buffer the video again.

3D is more compelling than expected, but I still can't imagine watching an entire movie. It is great for demos though. There is also a lot of content on the "Explore 3D" app on the Smart Hub.

Streaming from Netflix HD or Apple TV can appear pretty pixelated where it looks fine on my 40" Samsung in the bedroom.

Haven't noticed any screen uniformity issues yet, but I will update if I do.

I do notice something I think is called "ghosting" with some images. Mostly when I am watching sports highlights in HD. I see a little bit of an image around the fast moving person. I hope that makes sense.

I'll come back an update this later since I have only had the set for a week. So far it is exactly what I wanted. I have wanted this TV ever since I was in Fry's and saw a display. It was so different from all the other models that I saw. Very pleased with the purchase.
2981519
I purchased this Samsung from Amazon about 3 weeks ago now and I love the TV.

Although I am not going into tech specs I am a certified tech geek and thoroughly checked this TV out prior to purchasing.

BREATHTAKING Blu Ray playback.  Will just simply stop the show for those viewing.

Ease of use of features is much improved over previous Samsung sets.  I have owned 2 other very high-end Samsungs in the last few years.

Little mentioned:  The remote.  The remote functions using it's own frequency and works just like a good Bluetooth connection.  Translation - I can point the remote any direction and it changes the channel, volume, etc.  I can walk out into my driveway and change the channel.  CNET makes a point to mention the wheel turning is annoying.  Wheel-turning is annoying but you can simply press the buttons instead.  Best remote I have ever had.

The outward appearance is just top-notch.  It is a beutiful TV from the front, the side and behind.

The only other TV I have seen that functions any better is the 8500 model which costs $1000.00 more.  That unit offers TRUE LED backlighting, not just edge-lighting like this model.  Who cares!  Go with this unit.

Bottom line, stop your searching.  If you have the means, purchase this TV as fast as you can.  You are missing out without it!!

Thanks.
2706343
After buying my father a new SUHD TV I was blown away at the new features/capabilities of these Samsung TV's and decided it was time to upgrade my 10 year old 52" to a new SUHD 60".  My first generation LED TV did not have any of the internet capabilities now offered so that is a huge improvement.....but what really is the best improvement is the screen clarity/intensity/like oh WOW this is good!  I'll definitely leverage the streaming ability to stream MP4 movies I have ripped to a SAN device which is so much easier than dealing with DVD's.  Not a huge NetFlix/Amazon streaming person but this will at least get me to try that too.
215047
I originally posted this on AVSForum and feel that it's relevant to customer's here on Amazon who haven't been able to compare these televisions side-by-side.

"I just did this same comparison yesterday at Sears and came to a very easy conclusion after testing a variety of TVs.

I brought in a USB thumb drive with 1080p material, 720p material, and SD quality material. Some of the material was specifically for HD testing, while other material included TV shows, movie clips, and live music concerts.

The Samsung F4500 was far and away the better TV. It upscaled and downscaled flawlessly and gave me a fantastic picture regardless of the quality of the original source material. The Samsung was also able to play a variety of differently coded video and audio formats without a problem. I found the Media Player to be easy to access and intuitive to use.

On the other side, the Panasonic X60 did a terrible job upscaling and downscaling various picture qualities and in more than one case, actually added artifacts to the video that were not present in the Samsung. The Panasonic was not able to properly play some of the source material and in a few cases would only play video while displaying a large grey box indicating that it could not read the audio that accompanied the video file. I found the Panasonic Media Player to be very user un-friendly and in more than one instance it skipped ahead to a completely different video instead of just fast forwarding .

I went in expecting to see the pristine picture and action of Panasonic based on everything that I've read online about how great they are. After testing both TVs and the surrounding LGs and Sony's, I am convinced that the Samsung plasma F4500 is THE BEST budget TV of 2013."
444934
Better than the built in TV apps on my 4K Samsung TV HU8550. I've had early roku 2 and 3. They work fine, a little slow.. But ok. I'd been trying to get my Samsung based apps to be consistent and play video at 4K all of the time with few artifacts.. Not so much. Side by side comparison for YouTube and Netflix .. Roku 4 wins with far clearer and better picture.. This is quite noticeable. I didn't think it would be.. But it is. My guess is the chips and processing done on the roku vs Samsung. Another nice feature is the roku runs at 4K 100% of the time.
4627676
12-21-2010 Update......  TV has been great for 11 months... now it has begun to turn off ramdomly...  sometimes just resets and turns back on, sometimes I have to unplug power cord and plug back in.  After some research, I have found that there is a systemic power problem with many Samsung products and they have not or unwilling to extend warranties even though they know of the proplem.....  Be warned....  I am still not sure how to deal with my particular problem.....

2-2010...I purchased this TV a week ago, deliverd in 3 days.  Shipper delivered ontime, unboxed and set on stand for me.  Could not be happier with quality of picture and BluRay looks amazing.  I do agree with many that the sound quality is not terrific, but doesn't matter to me as I also purchased a home theater system. (Onkyo, also amazing!)

Highly recommend this TV for the Price!!
4431661
I feel remiss in giving such a low score. Most of the time, the image on this TV is perfect. Crisp. Clear. EXCELLENT upscaling of non-4K content. Excellent pixel refresh rate. Good sound. However, the basic purpose of a TV is to present images that match the intent of the director of the program you're watching, with some adjustments you make of your own preference. This TV does not do this most basic function because you cannot disable the auto-dimming during dark scenes.

To provide some context: There is a feature on most TVs that adjusts the luminance based on the brightness of the scene. For example, if characters are in a dim room and someone walks in front of a light bulb, the TV will become EVEN DARKER, as if you physically reduced the brightness of the pixels. This feature is intended to save power. I believe it is called "Motion Lighting" on this TV.

You can certainly turn Motion Lighting off, but what I found is that it just lowers the threshold for how dark a scene needs to get before the TV makes itself EVEN DARKER. You can try different image settings (Dynamic, Natural, Standard, and Movie) and get the illusion that you solved the problem, but this only changes the threshold for how dark a scene needs to get before the TV makes itself even more dim.

I called Samsung customer support, and they treated me like an idiot who didn't understand what I was looking at. I asked a technician to come to my home and inspect the TV. The technician agreed that this was a problem, and replaced several parts of my TV. Upon installing the new parts, the problem remained exactly the same. The technician suggested that I call customer support, at which point I completely lost confidence in Samsung's competence. The entire reason someone needs to got to your home to fix your TV is because the phone support was not able to solve the problem. If someone needs to come to your home at all, I expect the person to have a PhD in fixing this TV.

To summarize what came next, for days I asked to speak to phone support, then to that person's supervisor, then to that person's supervisor, etc. I finally reached someone who knew what he was talking about. This person told me what I already know: you can certainly disable motion lighting, which changes the threshold at which the TV will dim itself. You can certainly change the image setting, which (again) have different thresholds for how dark it needs to be before it dims itself. But you can't shut it off. He explained it to me as if this feature was doing me a favor.

If I don't like a feature, I don't mind it one bit if I can turn it off. Making this feature mandatory is a mistake. When the TV dims itself automatically during a dark scene (or during ANY scene, really), it is not representing what the director wanted you to see. That's the big problem. Associated with that, I find it quite distracting when I'm watching something, and the image actually becomes more difficult to see. Someone else might LOVE saving some energy and tolerate this feature, and more power to them, but I want the choice to turn it off.

And so, I believe this TV fails the most basic function that a TV is supposed to perform: to give you images that represent what the director of this TV show or movie wanted you to see, plus some of your own adjustments (color, contrast, brightness, etc) of your choosing.

I returned the TV. Doing this broke my heart because (when you're watching something bright, anyway) the image is AMAZING. But it doesn't perform the basic function of a TV.