NC (4/5): Reduces ambient noises but you will still be able to hear people talking, phones ringing, cars passing by etc. It's more like Noise reduction, with music playing however it offers alot of reduction. I could not here cars passing by, voices, or the sound of a loud 380W Stereo.
Lows (4/5): Moderate power however it sounds a bit muddy. Bassheads will need to look elsewhere. Good for most generes except Hip-Hop/Dubstep. With some EQ Adjustments (+2-3db 40hz+), It becomes much more powerful and carries a nice thump, great for Dubstep and such.
Mids (3/5): The midrange does not stand out. Vocals sound distant and lower drum and piano notes (Lower Middle C Note) do not carry much power and excitement.
Highs: (4/5): Vocals carry little sibilance and hissing, not very fatiging. Hi-Hats, snares, and the higher notes of the piano are powerful and cinematic sounding. Lots of detail, I could notice encoding errors in some songs.
Soundstage (4/5): Not extremley accurate, but pretty good. Instruments are seperated well but sometimes it tends to sound mashed up. I tested some games and movies on this and I was easily able to distingush where foot-steps were, which direction voices were coming from, and the direction of where gun-shots were fired.
Comfort (3.5/5): I have a average size head, (7 3/8 US Hat Size). The headphones require me to have the whole entire band extended, If you have a big head these won't work. The pads are kind of tight and most of the pressure is set on my ears. I feel nothing on head, but on my ears it feels like someone is grabbing them.
Build Quality (2/5): I have read many reviews on Amazon and a-lot of people say the Vinyl will wear off. I noticed many were also saying the headband was also snapping and cracking after a year. The design is almost 90% plastic, it feels a bit cheap. Made in China too.
Overall a 3.5 Out of 5. Good Sound, but not amazing. Not so good comfort while having good noise cancellation. They can be driven from a portable source easily (My iPod did great). I noticed a bit of improvement with a amp. Sound leakage was a problem too. At 50% volume you could hear the headphones across my room. It can be heard by about 10+Feet in a quiet place. In public little sound leaked out, except for Hi-Hats and some female vocals.