Having listened to these for a few days now, I would say I am rather disappointed with the sound quality. I was expecting rich high's, realistic mids and thumping lows but I was rather disappointed.
Depending on the genre, these would be most purposeful with rock, reggae, classical, pop. Hip-Hop, Rap, D&B, Dubstep on the other hand do not sound as good. Setting the equalizer to off, the headphones overpower you with lots of highs and mids, the lows are there but are very brief and dont really do the song any justice. Sounds like a virtual mosh pit. I would compare these headphones in the 100 price line, they are no way good enough to cost 200+.
Noise cancellation is adequate but could be better in my opinion.
If you want a good pair of headphones just for the house, get the Sony XB-700. The best headphones ive heard so far!