First Off, I like Bass in my music, and these definitely provide it. But not at a level that cancels out all other music on the headphones; just enough to make my Dubstep sound like it should. The headphones start to fade on some of the really highs and really lows, but for $90, they are worth it.
Out of the box they feel like some real components; no plastic in sight. My only downfall is after wearing them for an extended period of time, say...1hour, they start to really press on my head. Maybe there's a break-in period...
Overall: Solid headphones, good sound (not considered noise cancelling, but they pretty much are), just a little too tight out of the box.