PROS: The sound quality is pretty good. The bass is rich and smooth; treble is pretty clear. These headphones are more than sufficient for listening to MP3's or similarly compressed audio. They are also comfortable when adjusted right, and they look pretty stylish.
CONS: The ear padding does a crappy job of pushing the sound into your ear! With the same device and volume setting, these headphones sound quieter than all of my other headphones. On the other hand, my girlfriend said that she could ALWAYS hear my music clearly from across the room. For this reason, I can't use these headphones at work, and I'd prefer to not use them in crowded public areas where I might disturb others. Pretty much the only time I use them is skating.
In summary, these turned out to be one of my pet peeves: headphones that are more fashion than function. I would return them, except that I got them for $18 on WM so the return shipping almost offsets the refund!