Summary: I'll keep this quick and sweet, because I wasn't planning to write review, but ended up doing it anyway.
Great set of noise cancelling headphones. Portable, single-sided detachbale cable, great carry case, folds well.
Dark bassy and smooth. Works with our without Noise Cancelling, and sounds different in either mode. It's like having two headphones in one.
NC is very effective, cancels out most sounds especially ones that aren't high pitched.
Pros: Detachable cable, noise cancelling, works with NC off, small and compact
Summary: Even at first glance, it can be glaringly obvious that Head-fi in general isn't a fan of Active Noise Canceling Cans, and there are valid reasons for this; for one, the active NC module is prone to creating noise and distortion in sound on its own, and for two, there simply aren't too many good ones around.
Pros: Great noise cancelling ability, works without NC active, good sound (considering it's a NC can), comfortable, great value
Cons: Has typical active NC headphone limitations, and as such there will still be some compromise in SQ