I have to say that for the cheap price, these headphones are great. I bought mine new for $35 + shipping and they are exactly what I was looking for: people setting next to you can't hear your music; it let's in just enough outside sound to allow you to hear the phone or the doorbell or someone yelling at you; small, sexy, foldable; no amp needed; comfortable; great sound compared to almost anything in its price range. People say the PX100 sounds better, but they are open headphones- if you don't mind that then listen to those.
I do think, like others have said, that you should really turn up the volume loud when you break these in. After five days of burn-in, the bass is suprisingly good if you place them correctly on your ears (get a good seal).
If you are a starving student like me, there is absolutely no reason to dislike these headphones unless you have huge ears and can't get a seal. Any negative comments on the sound will be specific criticisms that should only be directed to audiophile headphones. These are not audiophile, they cost thirty-five dollars.