I don't think they are even released yet, because they were just announced at CES. It's interesting that some of their parts are created by a 3D printer.
I never used headphones until I got a good deal on a pair of PSBs. I picked up the psb speakers m4u 2 because I got an extra $100.00 off for going to a local dealer's after hour events and they are excellent.
They were tested on Human Cadaver on how sound travels through the ear canal. I am not sure if I am a big fan of this, but they do sound good