My impressions copied and translated from another forum:
I've got to say, they do sound fine. Definetly a BIG upgrade over the iBuds, mainly in soundstage and bass. Imaging is consistent, good instrument separation and airiness. It's not the most refined sound in the world, but it is effective in its presentation.
Port design is very clever, interrupting any of the openings really changes sound. Ports are common in home / car audio, even some headphones benefit from some sort of porting, but I had never seen it implemented in such a way.
As for their signature: Sound is really focused towards mid-bass and mid-highs, probably to give a sensation of loudness, which can result fatiguing. In fact, I used them for a couple of hours and was already feeling some irritation, after break in the harshness has improved but it's still present. They sound particulary well with dance and pop music, and I have to say I was surprised by their performance with classical music and piano (perhaps because of their open design).
They're VERY sensitive to ear positioning. Too tight and you get too much bass, too loose and bass disappears. Aimed up and down alters behavior of the higher frequencies and mids, etc..
As for fit and comfort, I'm not really a fan of hard plastic against my ear. It fits really nice in my right ear, but left ear is a problem as I can't get a good fit, therefore left and right sides sound very different unless I press on the left pod. This just about kills it for me. But to be fair, it is more of a personal anatomic problem and I think most people won't have this issue. I'm going to try and see if cushion covers improve comfort or else I'll just sell them to the first Apple fanboy/girl across my path.
Generally speaking, they're competent, I believe they have a sound that will be liked by most people, and it will sure be welcome to those who don't want to spend on headphones beyond what came bundled.
For $30 you can do much worse, I think they have a good price / performance ratio. They have their virtues, but also their deficiencies, to my ears they're not even close to mid-tier IEM's (no match for my X10's), and I honestly believe that saying they have been overhyped is quite an understatement.
My conclusion is that they sound very good for being "stock", and even at $30 they are a good alternative, but are definetly not in the same leage as higher priced (and reputable) IEMs. Of course sound is all about tastes, so YMMV.
