Surprising sound quality for price
931324
Sound quality on these is excellent, far superior than anticipated at this price.  Highly recommend, but be sure to completely charge the headphones or you may get interrupted mid-song.
444737
Wasn't expecting much sound quality for the price, I really like the sound from these considering what I paid.

In the equalizer (foobar2000) I find myself lowering the 1.8kHz and 3.5kHz a little bit (about 3dB) and the 2.5kHZ a bit more (6dB), this is fresh out of the box so maybe some burn-in will help (see 'edit' below), and of course a lot of music doesn't hit those frequencies the same way so it's usually no problem.
The bass from these could be slightly stronger but for the price and form factor (non-canal) it's great and better than I could have expected.

I just needed something to replace the completely horrible ear-buds that came with my 3 year old sansa mp3 player that were also not in-ear canal (I like MEelectronics M9 a lot but they are tough to keep in properly while I'm active) or full-size/over-ear headphones like Sennheiser HD201, which these sound similar to and in my opinion these sound slightly better with HD201 having slightly less bass and a bit to much treble compared to these.

few-days-later-edit:
After letting music play through these for probably 60-ish hours (at slightly higher than normal listening volume) it seems to have softened the 1.8khz/3.5khz enough that I find no need to adjust them and the 2.5khz range still needs about 3dB reduction for a particular song or two. Not enough of an issue to bother with, though.
Still very happy with these, no problems so far.
1388162
I was surprised at the quality of sound for such a reasonable price!.  I would recommend these for anyone that listens to music or their PC
and doesn't require perfect sound!
1010444
Good sound ,the range of the Bluetooth surprised me,great value overall.
1350110
I must preface my remarks by noting that I have used theses earphones for approximately 4 weeks, which does not allow me to attest to their reliability, nor are they broken in sufficiently to fairly assess their sonic capabilities (or lack thereof). Nonetheless, my impression of these earphones at this point is very positive. I purchased these phones to use with my newly acquired I-phone, with the preconception that I would have to live with some inevitable sonic shortcoming. Surprisingly, they sound very good (in most instances, not noticeably inferior to my other headphones-Grado SR 60 and Koss porta pros). As others may have noted, these phones are somewhat bass-shy. Where they shine is in the mid-range and high registers--the mids are very natural sounding, and the upper range is without the shrillness plaguing some phones. I have played these phones both directly plugged into my I-phone, and via a headphone amp. In both instances, the audio quality has exceeded my expectation, and without noticeable distortion, unless driven very hard (i.e., at volume levels approaching pain thresholds (of course, they will play louder when played through the headphone amp). Are these the best $50-$75 earbuds out there? I have absolutely no idea. All that I can say is that so far, I am very happy with them.
1999341
beyond my expectations. amazing sound quality.
875847
Truthfully, I didn't expect much from these speakers at this price. I am not an audiophile-I do not have expensive sound reproduction equipment for my home theater system. I am an audio guy in that I record. produce and mix audio professionally. When it comes to watching movies, I'm not that particular and that's what these babies were purchased for. I put on the Pat Metheny Live Speaking of Now DVD which is a pretty good sounding disc and was really surprised. These little puppies really pump out a whole lot of bass for their size and it's focused and tight. I actually turned my subwoofer off for a while and was surprised by how well these puppies held their own ,considering the 5 inch woofer. The highs are a little pronounced, but that's sort of the way I like 'em, so it doesn't bother me much. And there's a surprising amount of detail in the mids. I paid $125 and now I see that Amazon has lowered the price to $120!. It's ridiculous really. I'm seriously considering getting an extra pair for my bedroom. Considering the price, you really can't go wrong with these little monsters.
2485233
I got introduced to these at work (they handed them out so we could listen to stuff without disturbing our neighbors). I was blown away by their sound, and thought they were a much more expensive pair. I was shocked when I looked them up and saw I could get them for $25! I'm really impressed by their clarity; I'm able to hear things in my rock music I've never heard before. Bought a pair for home, now I'm going to get a pair for my daughter.
4746410
I ordered these speakers as a gift for my wife, after having considered the more expensive Bose Companion 2 speakers. I had listened to a demo of the Bose speakers in a retail store and thought they sounded, well, just pretty good. I suspected that was about as good as it would get within the $100-or-less price range. However, after reading numerous rave reviews of these JBLs online, I thought I'd order them so we could give them a try. I was a little skeptical, quite honestly because of their low price. When the package arrived and I unpacked the speakers, I became even more skeptical. The speakers were much lighter than I thought they would be. I suppose I'm an old-school audiophile who had thought that the only way to accomplish big, rich bass is to have a heavy magnet  driving the woofer. What a surprise when we connected the speakers and listened! The bass was surprisingly rich, full, and deep. The high end sounded very good, as well. In short, these speakers sound surprisingly great for their size, their weight, and their low price. I highly recommend this product.
387760
This pair of headphones sound insanely good for the price. I compare it to my pair of Shure SE115's and I would say they are just as clear and sound just as good. Pairing is easy and it stays in my ear very well, comfortable to wear. I just can't believe something that costs in this price range sound so good. I wasn't expecting much when I ordered it but wow, I am truly impressed. Is it audiophile grade? Of course not, but is it much better than other earbuds under $100? Heck yes. Still way surprised at these.
64882
After moving from a pair of ATH-PRO-700MK2 to these, I was pleasantly surprised.

The sound quality is very good, with reasonable reproduction across the spectrum. Bass has punch, albeit not as much as the 700MK2s, but still sounds good. Midrange and trebles come through crisp too.

But the sound quality is just the tip of the iceberg for these headphones. The features Plantronics piled on makes them absolutely excellent.

The active noise cancellation works very well, and the open mic feature is great for open office plans when people come to talk to you.

The controls are very sensible, and well placed, I quickly learned their positions and didn't have to keep taking the phones off, a problem I've had with Sony sets.

As for the comfort of the phones, they were tremendously comfortable. The cups and bands are soft and smooth, and didn't make me itch, like many other headphones have, and the weight is light enough that these are something you can wear all day.

The only downsides I've seen in these is that the bluetooth controls don't work particularly well on macs, being unable to pause/play/skip music, but they worked fine on my phone. The only other disappointment was that they come with an Apple cable, rather than a generic one. This is great for my mac, but pretty much just acts as a standard audio cable for my android phone. You can buy a generic cable, for $20, but it would have been nice if both came in the box
2514346
Excellent sound quality, great item, especially for price.
2963504
Amazed by the sound quality for the price. Syncs without issue, decent range. I like the phone call feature that alerts you to an incoming call and functions as a speaker phone for the call. Great value..
185440
After using these for a few weeks, I am impressed for the price.

Sound quality is average, but that isn't bad considering the price point. It easily trumps many $20 headphones. The bass isn't especially strong. The highs don't sound tinny or shrill. It is very middle of the road, but that is fine by me.

There are a lot of small details that set these headphones apart. The first are the magnets that make the ear buds connect to each other when not in use. It's such a simple feature that prevents tangling - I wonder why other ear buds don't have it. The remote works well on both my Windows phones and Android phones. The flat cable also helps to prevent tangles. The part of the ear bud that contains the magnet is also textured differently depending on the ear. The right side and left side both have a different feel, so it is easy to put them in correctly without looking.

These aren't perfect by any means. The fit is a little loose, I wish there were silicone tips to make them fit better. I had a hard time keeping them in my ear during my runs after I got sweaty and picked up the pace. The sound is, again, just average, but that is expected at the price point. Still, for the price, I think these are a steal. I don't mind using them in the gym and if I happen to lose them or they fall apart, I won't feel guilty about destroying a pair of headphones.
2707557
Sound quality was surprisingly good; much better than I expected.
Battery life was at least 20 hours using rechargeable Duracell batteries.
Padded carrying case included.
Replacing the battery-compartment cover involves some fumbling until you get it figured out; be patient.
One Altec speaker vs. a stereo docking station: you get one pretty good speaker instead of two pretty crummy speakers that have no real stereo-separation since they're only a few inches apart.
I doubt you can do better for under $30.
2747733
I ordered this unit because I wanted to listen to my Iphone 3GS without the gsm interference.  When it arrived, I opened the box, looked at it, and said, "This is gonna be a joke."  I was wrong.  For such a small set of speakers, I received incredible sound.  Sure, it does not produce the sound of a $150 sound system, but I am very satisfied with the clarity and crispness of the vocals and moderately satisfied with the bass.
241642
Didn't expect such high quality sound from these low priced headphones. They're pretty awesome for this price. Asked my brother to guess the price, he put it at around 200$. These are that good. Packaging is not fancy but it has a nice carry case. Seal is pretty tight with no chance of falling off.

Highly recommended, even if you own high end headphones, these could act as good backup.