Pros: Bass. Clear, tight, deep, penetrating bass. Zero distortion. Built like a tank.
Cons: Stock pads aren't the most comfortable. Very colored sound, not a good "all-around-er".
Paired together with the iBasso D6, these sound phenomenal when playing Dubstep, Trance, House, Etc (Lossless) out of my laptop. They are relatively easy to drive, and will sound fine out of an iPod, but you don't know what they are "capable" of until you amp them from a good source. I still have wow moments when I play a new song, and I've already had them for 6 months. Got the J money Denon pads, made them a whole lot more comfortable, and increased soundstage just a tiny bit. Next on the list is the XB700 pads. These phones are a lot bigger in person than in the picture, which might make some self-concious folks weary of wearing them outside. However, with the J money pads, these isolate quite well, which makes them great travel phones in my opinion. I wore them for 5 hours straight, on a bus ride from NYC to DC: they never got uncomfortbale and made me feel like I was alone with my music when I closed my eyes. These won't drown out jet engines, but the baby crying in the seat next to me didn't bother me one bit.
Purchased some K702's for other types of music that isn't bass dominated (Classic Rock, Vocls, Etc.). Don't see myself selling these any time soon.