These guys set up shop around my campus today. I tried their revolution headphones, and they sounded pretty good. Very comparable to other phones in the $90-$120 range.
I used my iPhone 4S, unamped, but played several lossless tracks through them. They would benefit from a little amping, but overall, I was very pleased with the sound.
I'm not terribly fond of on-ear headphones, but they didn't squeeze my ears too much. :)
Sound-wise, the bass definitely...