Average Speed SSD. Worth the money though.
345388
Arrived as advertised but stopped working within a week. Returned and got a replacement very quick! So far so good. Average speed SSD, but better than a regular spinning platter drive.
2370800
Love it. Great price for a SSD one of the most affordable out there. I know there are faster ones out there but this one is so much faster then a hardrive I don't feel the need for any more speed. I have not done any benchmarking or speed tests on this. Windows boots in (feels like) about 5-10 seconds I haven't actually timed it but its extremely fast just a matter of seconds. No dreading restarts because they are so fast. I'm mainly just putting windows and smaller applications on here so I don't know what the performance if most of the space is used. For me and how I view computers I like to get the "sweet spot" performance vs price. Although this is one of the cheapest 120gb drivers out there it's a great sweet spot IMO because that little bit extra speed you may get out of a higher end driver isn't worth it for my needs and I understand for some it may be great overall drive so far. Only had for about few days but hopefully holds out for many years.
4117699
It is a cheap SSD. However I have 2 of these in mini computers and both had horrible issues with windows 10 and 8, mainly 10 where drive access would peg itself at %100. The drive just dies when windows has superfetch enabled (Not needed on SSD's but can be enabled by default and most common users will have no idea why their windows runs slow as molasses). This is apparently a firmware issues more then anything, but PNY isn't fixing it. I will stick with samsungs EVOs from now on.
4130505
It's a great SSD.  I have no problem with the SSD itself.  It seems to perform well (though I haven't benchmarked it).  In addition to more RAM, an SSD is an essential upgrade for anyone that wants to enhance the performance of their computer.

Here's the thing:  I've been building computer since I was 14.  In 1994.  I'm a compulsive screw hoarder.  I have just about every type of desktop and laptop screw imaginable.  But I only had 2 screws that would fit the Dell motherboard that this SSD was going into.  Both screws were identical, and the heads were too small to capture the SSD.  So I had to make a washer out of some card stock and tape (the tape to keep the screw from blowing through the card, and the card to provide stiffness).  That's how the SSD is now held into the computer, with paper and tape.

I understand that different motherboards (or PCIe cards, etc.) will require differing types of screws.  However, I would gladly have paid $2 more for this product if it included, let's say, 5 of the most common screw sizes/pitches.  Because it took me almost 30 minutes to find the right screw, the Torx driver that went with it, and to make the "washer".

The average consumer is NOT going to have the correct screw to install this SSD, unless their motherboard (or etc.) came with one.  No way.  The most common complaint in these reviews is the lack of a screw.  It would be so cheap and easy for Samsung to throw a few screws in the package.  Most retail-packaged HDDs include mounting screws.  It's practically an industry standard.  And those are common screws that people MIGHT actually have laying around (I have several hundred).

So you may think it's harsh to take off 2 stars just for the lack of screws.  But as I see it, it's an essential component to, you know, actually use their product.  And again, I only had the appropriate screw because I'm a mildly irritable hoarder.  The average person will not.

Pro-tip:  Your laptop may not actually need all those screws on the bottom.  One of them may fit the mount for your SSD.  So go crazy, and don't blame me when your keyboard pops off.
4607392
Fast, cheap SSD for those that want a fast PC without breaking the bank (or using funds that are better suited for buying a GPU)
449499
I bought this 250GB Samsung 840 Evo in December 2013. The price was alright and it has the speeds I was looking for at 540 MB sequential read and 520 MB sequential write. The price seems to keep dropping its a good time to pick on of these up. I install the drive, used the software, migrated my data from another SSD using the software and it was done. After using the migration tool you can install Samsung Magician which handles firmware and all other setting for the SSD. Overall I'd buy another Samsung SSD.

Edit again if have something to add.
4506794
Freakin fast as Herll, Its exactly as it says.

Hopefully on cyber monday the prices drop on these SSD's everywhere.

Am definately staying with SSD's as my main os storage from now on. ALWAYS
769288
Picked up this SSD for a boot drive, and at a good price. I wouldnt say this drive is the best, in fact its not nearly as fast as many other SSD's. See the benchmark results here [...]
Its on the bottom of almost every test, but of course still faster than the spindle drives.
Does the job I needed it for well. I have win 7 64bit (7 gb once I disabled hibernation and got rid of the pagefile (Ive got 16gb of ram), office (2gb), and a few of my main programs on it (8gb). Still have lots of room to spare. All other files including user folder and temps on either my ramdrive or spindle. Great read speeds, and my rig boots very fast.
Overall, a good drive for the money. If you have extra cash, or want something more in the middle of the road shop elsewhere.
3471989
This is the first time I have experienced the speed of an SSD. Best upgrade you could make to a computer. I have had mine for a few months now and it is still working like a champ.

Pros:
Speeds up the computer dramaticlly
Is silent unlike conventional hard drives
Easy to install with the included software
Comes with easy to use and helpful software

Cons:
A bit expensive
Requires a bit of computer know how to get full speeds out of it.

Additional Info:
My OS did once corrupt on me but I suspect that it was my own fault as the little behemoth is running the system fine at the moment. If you have the money and your computer is crazy slow this is the best thing you could upgrade to make it faster
4471125
Very good SSD. Worked perfectly and is very fast. Boot time is under 10 seconds. Haven't had any problems so far.
Plus the price I bought it at for the amount of storage was a really good deal.
2737975
A good, fast SSD. The 850 Pro series is rated (and tested) to have one of the longest life-cycles out of all the mainstream SSDs.

I've personally got the 128GB, 256GB and 512GB models in my rig at home, and I'm never disappointed with loading times on anything from locally stored videos to large-scale games. The price jump actually masks the drop in $/GB, dropping down from .51 to .47 (at the current MSRP); so make sure you've got the space that you need.
1843141
Nice reliable drive the hybrid nature of it (8 gb ssd built into it stores the most used data) I've gotten about a 20% reduction in my boot time. Some games load or respond faster.
If you need to replace your drive or increase its size, get this!
It won't give you the same performance as an SSD but it's a sixth of the price of a comparable size SSD
2223402
It's no surprise that Samsung's 840 line of SSD's have a reputation of being reliable and affordable. I have an external that I backup an image to. The SSD is in a native Intel SATA 3 (6Gb/s) port as it should be and works great. My boot time in 8.1+Update 1 is about 7 - 8 seconds. That's about it... no RAID array to go over, etc. at this point in time. Perhaps on down the road as you setup RAID in the BIOS before installing an OS.

A lot of people have posted the specifics regarding performance and RAID 0/1 and so on so I will not go into the technical aspect. So far the drive performs great and does what it is intended to do. I would suggest people look into this or a similar SSD instead of any mechanical drive for an OS drive or any programs/games that would benefit from the extra speed. Just don't buy one to store you music on please.
1297586
Pros:
- Ridiculously Fast SSD!! Rated Speeds are TRUE!!
- ADATA Reliability with a 3yr Warranty
- SSD Toolbox & Migration software available too
- Decent build quality, doesn't feel like it would break if you sat on it.

Cons:
- None so far. Worked great right out of the box!

Conclusion: There are a tone of inexpensive good SSD solutions these days. It's a great time to need to upgrade that old PC or Laptop. Speeds were also exactly as advertised which is great to see at a 39.99 price point. I included a screen shot of 4 different SSD benchmarking tools which all seem to confirm the SP550's rating.

Crystal Disk Mark - 557.0 Read / 456.9 Write
Samsung Magician - 559 Read / 463 Write (faster than my 250GB Evo @ 405 / 423)
AS SSD - 501.23 Read / 464.87 Write
ATTO - 558 Read / 475 Write

One last thing. We placed this in an HP G72 w/ Intel Pentium 2.3Ghz & 3GB DDR2 Ram originally running Windows 7 64 Bit. My client was on a tight budget so it was a choice between SSD or Ram. And considering it had years of cruft accumulated and a few viruses to boot a clean install was going to be needed anyway. So SSD it was. Boot time improved by half!! Went from 1 minute 4 seconds to just 27 seconds after the upgrade. And that's with all updates and programs reinstalled! Client loves it. We'll hunt down more ram later. But for now... going SSD was the biggest bang for the buck. Get some!!
1397155
I've rolled out a bunch of these, in addition to the Samsung EVOs. The EVOs at the same price point have a significantly better startup time. This Crucial is a decent SSD, but for the same price you can get better performance out of Samsung models.
583377
If you're looking to upgrade your computer, get an SSD! boot time went from 1:30 seconds which consisted of powering up, entering my password and opening an application (Google chrome browser). The same sequence with this SSD installed resulted in 28 seconds total (3x improvement). It wasn't worth timing the shutdown, which was maybe 2 seconds, and applications open in a split second. I do not understand why modern laptops or desktops have traditional hard drives. It is like still having a cassette player in your car.

I was going to mark this 4 stars, as it was a bit price, but honestly, for me this was worth it!
4764917
I'm a computer savy person.  I did lots of research before buying this.

Pros:
Best deal in the market at the moment for a 256GB SSD that can do 550/530MB read/write.  I have not tested to the read/write spec, however, I have seen overall system performance boost of up to 40% compared to standard 5400RPM 1TB HDD.  Works out of the box.  I have had this for a week now and not problem so far.  I would buy or recommend this.

Cons:
None at this point and hope to not find one.