Sound. Value. Surprisingly comfortable!
919594
For the price, these are pretty killer. They sound very good and are pretty comfortable. They have those horrible squishy earbud gummy things, but for some reason, these fit my ears where other ones do not.

The only real downside that I could say would have to be the very loud sounds that anything rubbing on the wire creates because of how completely blocked out the world is from the sound blockage. They are literally like ear plugs when I put them in and the world is all but cut out. I would where these at a very loud concert and probably find a second use for them!
3165530
I'm no audiophile nor do I have any earbuds in the $100+ range, but I do have several in the less than $100.  I bought these to replace a pair of Panasonics in the same price range as a disposable set and was surprised at the significant upgrade these were to the Panasonics they were replacing. The six pairs of silicone ear tips made finding a custom fit perfect for my ears and while yes, the cord is heavier than what I'm used to, and can telegraph noise if it rubs across hard surfaces I don't use them typically while doing anything more strenuous than walking (even at a brisk pace, simply wrapping the long cord with a small rubber band and putting the player and bundled cord in a breast pocket, problem solved).

I tried out the 3 different caps and while the cap listed for "Pop music" didn't deliver any noticeable differences, the one for "Jazz" and "Classic" were significantly better than my previous panasonics both for music and digital media content.  I frequently use binaural beats during my daily meditations or when doing demanding article writing, research, etc and found that my alpha, gamma and theta tracks were all delivered to better effect, and the ear tips were comfortable enough that even after 8 hours of use my ears weren't protesting.  Pitting them against a set of Skullcandy and Sennheisers that were 8-11x more expensive and I couldn't tell the difference in sound quality, but again, the caveat being I'm a more casual user of this sort of thing.
897468
These headphones are a great value!  After reading about these in several reviews online, I decided to get them for use on my home computer for general use as well as video editing.  These headphones easily perform at the level of $100+ units.  The have excellent bass response but not overly exaggerated. The foam is large enough to completely cover my ears (which are on the larger side since I am 6'3") and are very comfortable to wear for extended periods of time.  Noise canceling is not the best I have tried but certainly does a great job. The top foam padded strap makes for a very comfortable setup even when wearing them for extended periods of time.  After 10 minutes, I could barely tell they were there.
4747066
Surprising set of "inexpensive" headphones that I use to monitor sound while doing video shoots.  As such, I don't mind if these get lost or stolen since the price point is right.  The biggest surprise is the bass response.  Although it is not as deep as my Bose, it is impressive. The mids and highs are right there also.  Additionally, the cable plug is an L and quite durable. For the price, it is an extremely good buy.  These are "over the ear" and are quite comfortable.  I don't expect the foam pads to last forever but so far these are great.  No complaints and I won't cry if these get lost.
177810
Extremely comfortable even right out of the box.  Sound stage is very nice and expansive.  Gaming has been great on it.  Even weird russian song Chun Drum Bedrum sounds good on it, though it was kinda scary to watch (ah ah ah ah...ah ah ah ah).

My daily headphones are Vmoda Crossfade M100's with the memory foam upgrades, and while those do sound better, I can say that the comfort of OB-1 even right out of the box feels better over my head.

I can confidently say that if anyone has a sub $100 budget and want nice sound, the ob-1 won't disappoint.  Get something like the maudio bass booster and you can have an incredible listening experience for sub $110.
2978003
Unexpectedly great sound quality, and I'm a bit of a sound snob. The buds are a bit too big for my ears, so the little foam things are a must for me. Would recommend to someone looking for value and quality.
2137018
These headphones are AMAZING.

Pros
+ The most comfortable things you will ever wear. You could probably use the padding as a pillow if you weren't afraid of breaking the headphones.
+ Even for long periods of time, your ears will have plenty of space in there.
+ Delivers powerful base and satisfying treble. The Bass does NOT overpower anything. I don't know what some of the other reviewers are talking about.
+ Easily adjustable for your head size.
+ The padding gets thinner when you put them on your head, so they won't look as silly in public.
+ The cord is flat, so it rarely if ever get's tangled.
+ They overall just have a stylish, modern design. You will feel proud wearing them.
+ My friends envy me, they want these headphones.
+ When people ask me how much these were and I tell them $50, they says WOW! Thats cheap! Because it is. What a bargain!

Cons
- The cord is quite short, so using these when you are on the computer can be a tiny bit troubling depending on how your system is set up.
- They cancel a little bit of noise, but not much. You can't expect a whole lot of noise-canceling from $50 headphones.
- Depending on how loud you play your music, people around you will probably be able to hear what you are listening to.

BUY THEM BEFORE THE PRICE GOES UP AGAIN!
1797671
Great sound! Comfortable! Nice bass! PRICE!!! Oh yeah I will get another.
1800498
I just got these today in the mail and I have to say I am very surprised and satisfied with them.  They are comfortable, they are a very reasonable price for the quality, they eliminate a lot of outside noise and most of all, the sound is amazing.

The Sound: When you get used to them (as you have to with all earphones) and figure out the perfect way to put them in your ears (only takes a couple minutes) they really come to life.  The bass is very impressive for such a small pair of earphones, surpassing Bose in my opinion (and for about 1/3 of the price too!).  The mid's and high's equal eachother out with the bass so everything sounds crisp, no distortion when put loud.  I mainly listen to rock/metal so I like the bass to stand out, with these it does.  They don't hurt your ears what-so-ever.  The 3 handy, super-soft ear-plug sizes are a nice addition as well.  I have yet to keep them in for a long period of time, but I don't see it becoming uncomfortable.

The Quality: Sennheiser puts out some great products, and these are definately worth the money in my book.  They seem sturdy enough to last a long time and the cord seems flexible, but in a good way.  The jack's fit into the outlets snugly, so you don't have to worry about them popping out with normal usage or running.  I also really appreciate the handy little leather carrying case for these, perfect to put in your pocket or locker (just don't sit on it).

The Price: Good price, good value, get it.  I chose these over Bose and am glad I did.  These have the same sound quality as Bose to me, and were a lot cheaper also.

The extention cord: quit complaining about it!  If your going to judge on how earphones perform on an extention cord made to make your life easier (short part for joggers who prefer strapping their mp3 player to their arm and long for those to like putting it in their pocket) then you are stupid.  Dont like how it hits up against your chest when your running?  It comes with a clip!  Clip it to the outside of your shirt where it bounces OR just tuck it underneath your shirt- and EVEN if you are not satisfied with that clip it to the INSIDE of your shirt.  People just need to find SOMETHING to complain about... 'nough said.

Summary: Very high quality little earphones with amazing sound and a affordable price tag.  Easily able to rival brands such as Bose and blow away those such as Sony.  Go with these, you won't be unsatisfied!
2041096
Comfort: I think ZeosPantera said all that could be said on his YouTube review. The NVX XPT100 air "Like a set of ear kittens." The pads are extremely soft, the headband not too tight, I honestly can't think of a way that comfort could be improved.

Sound: When I put these on, I could not stop smiling. My only complaint was slightly weaker bass than I'm used to, so I just used ViPER4ANDROID on my Samsung Galaxy S III and turned on the "dynamic system" tweak to get a little more punch from the cans. The bass has amazing extension, the mids are present without seeming too in your face or recessed, and the highs are audible without being harsh. Overall, when I hear these cans, the only real way I can put it is everything sounds like it should. Isolation is amazing. Even at full volume nobody can hear what I'm listening to, and at mid volume, I can't hear them either.

Build quality: While the build quality isn't perfect, it's not bad either. The weak point of the build quality for me is where the headband connects to the actual earphones. It doesn't seem like they'll fall off or anything, but it's a bit too easy to remove them in my opinion. Overall, I'm extremely satisfied with the build quality and feel as if these cans will last me a few years at the very least.

Other concerns: The headband is a teensy bit too loose. In that I mean, if I headbang, they fall off. I expected that, and it's truly an extremely minor concern.

All in all, my ratings are this:

Quality: 5/5
Comfort: 5/5
Build quality: 4.5/5
Value: 12/5

These headphones are worth much more than their price. I'd easily pay $200 for them.
284436
I'm no audiophile, but I know what sounds good and these do.  PROS: Deep bass yet clear enough to pick up more subtle notes. Comfort. These are very comfortable. The padded headband is a plus if you're gonna wear these for an extended period of time, and the ear pads are nice and thick. They completely cover my ears so they do block out some outside noise, but not much. If you're looking for something that is truly noise cancelling these may not be for you. CONS: They look and feel cheap, but for $23 I honestly didn't expect much in that department. Sennheiser obviously put their efforts into sound quality vs.looks, which is good beacuse that's what you are should be paying for when you purchase audio equipment. And lastly the cord. At 10 feet it's about 4 feet longer than necessary, at least for my needs. They do include a thing you can wrap the cord around, but then you will have that dangling around and it's kinda cumbersome. I will definitely end up using a zip tie instead.

I was torn between these and the Sony MDRZX110NC.($38 on Amazon) I happened to see them at Target today so I bought them to see if I made the right choice. Needless to say the Sony's are going back tomorrow. While they did look nicer and had the ability fold, which is nice for traveling, they weren't near as comfortable, and even with the noise cancelling activated they didn't sound as good as these.

Bottom line: Great sound, very comfortable, but they could look better, fold for travel and have a shorter cord. 4 out of 5 stars.
4058825
Being sort of an audio-aficionado (won't go as far as calling myself an audiophile) I got these for my girlfriend.
I used as comparison a set of Sennheiser PC360's. She uses them to listen to ASMR videos and listening to music.

These are definitely well built, slightly on the heavy side for my taste. The finishing and build quality is higher than I would expect for headphones in this price range, they feel sturdy.

As far as comfort: Other than the weight, I think they sit perfectly on both head and ears.

Sound quality:
BREAK THESE IN! Just plug them in and let them play for a couple of hours, repeat. These guys are the perfect example of how much of a difference it makes when you 'break them in'. Plug them in, put them on, play a song, listen to it... remember all the stuff you had to 'complain about'... boomy bass, lack of definition on higher mids and highs.... listen to other stuff an hour or two, go back to your first song. It makes a WORLD of difference.
Overall, I believe the sound quality is excellent. I think they deliver a very 'full' sound. If I had to pick something to complain about it would be that the mids sound full and encompassing but not as well defined as the highs and lows.
I don't think I have ever heard anything like this in a similar price range.

A big plus is the portability, they fold nicely, come with a case and have a coiled cable.

Definitely buy!
2835684
I was skeptical of all the 5 star reviews for such an inexpensive Bluetooth earbud set. I have to say that I'm blown away at the quality, comfort, and sound of these. I can't attest to battery life yet, but I've  been listening for many hours and they're still going strong. Range is normal at about 30 ft. Pairing is much faster than my previous set and it seems to play much nicer with my equipment than my previous set. Phone calls are good too!

Update weeks later. Still love these things! Battery life is every bit of 8 hours at reasonable volume and the comfort is amazing. I can wear these all day without any discomfort. Phone calls actually work good too. I was skeptical of that feature, but I've carried on several conversations without any issue. I have no idea where the mic is located, but it works just fine.
3357345
I did not expect much from these headphones at this price, but I only need them for studying and listening to lectures with occasional incoming calls, so I didn't want to invest a ton. I have been pleasantly surprised by the comfort and sound quality. They perform as well or better than my husband's more expensive headphones. I enjoy the around the neck style and have forgotten I am wearing them on a couple of occasions.  I have used these for 2-3 hours a day for the past 3 weeks and the battery level is still "medium" from the out-of-the-box charge. Paired easily and connects within a few seconds of turning them on. I guess my only slight criticism would be that they bounce too much to be beneficial for a cardio workout. I bought a different headset for that purpose.
3106457
I need ear-buds as a daily alternative to my over-ear Bose QC25s that I use for long distance travel. I also own a pair of Bose QC15s. So in selecting what you might consider to be something "cheap" in relation to the others - your expectations would duly be lower. BUT, what a great surprise! These buds are incredible. The sound is "full" and they are extremely comfortable. They isolate noise really well (I am writing this while my kids are watching TV in the same room and I am happily oblivious!). From the packaging, to the feel, to the comfort and the sound quality, this is a 5 star product and extremely good value for money. Highly recommended.
1853091
I'd never had a good set of headphones before I bought these. I'd been using the best earbuds $10 can buy, and although they had good audio quality I wanted a to do a bit of music production, just for fun. An indie producer on one of my forums recommended Audio-Technica ATH-M50S headphones; he said they were pricey but worth it.

I waited until they were on sale for $100 and snagged a set. They came in the mail and my first thought was that they came in nice packaging. Good so far. The default plug-in size is the standard 1/4 that most MP3 players and computer speakers use, and there's also an included adapter that ups the jack to the larger 1/4 inch that professional audio equipment requires. Additionally, there's a black draw-string bag included that's handy for traveling.

My first listening impression was... it was weird. I was used to having either hearing either no bass at all (with my earbuds) or tons of bass from every direction (home theater speakers). The Audio-Technica ATH-M50S certainly has bass, but not overly much, and not at the expense of the high frequencies, which steal the spotlight. I'm no expert and I can't tell you the frequency details, but to me these headphones have nicely balanced sound.

I was impressed at how much "bigger" my favorite songs sounded, and after one or two listening sessions every I decided I'd made a good purchase. I still think I did, half a year later. I use these headphones every day, and I haven't had any performance problems. This is how music is supposed to sound, and my ears have adjusted to the point that music heard through a car stereo or a pair of decent earbuds sounds like it's been butchered.

As far as usability goes, these headphones are fairly comfortable even if you're wearing glasses. There's padding on the surfaces that sit directly on your head, which is a nice touch. The cups can fold up under the top arch, which is nice for traveling, but otherwise I always keep them in the regular position so I can grab and go.

Keep in mind that these aren't noise-isolating headphones, so be expecting to hear background noise if you're on an airplane or on the highway. Also, the cord is SUPER long. I can see how this would be advantageous in a full studio set-up, but for the rest of us it's rather annoying. I keep the excess wound up in a couple rubber bands and stuffed in my pocket. Thankfully, the cord is also thick, so it doesn't tangle too easily.

Overall, I believe I made a good purchase. You're not going to find any better headphones for under $175.
200316
For $40, these are a steal.  They're comfortable, sound great and seem to be very well made.  They're not as good as my Etymotic  6i Isolator Earphones  but they're not $100+ per pair, either.

Great value!