Mine just got here and I hate to say they may be going back...
Build quality is sub par compared to any other HP I have tried - the tiesto logo is already coming off the ear (shotty lue job) and the two sides swivel quite differently - one easily and the other requires more force.
Fit is more on ear than over - very close to how the beats pro sits almost over but still on ear. Less clamping force than beats pro and more than k550, which was far more comfortable.
SQ is not fair to judge yet considering the burn in time I had to give the 550s before they sounded nice but I can say I heard no difference between the 3 bass stages... Seems more gimmicky than anything at this point and slider/selector feels cheap.
Guess I'm really disappointed as I thought it would blow beats pro out of the water for portable non-iem use but I can say I'm already seriously considering sending back and getting the 551s for their better build, comfort and soundstage.
Needless to say I'm totally bummed.