I've got mine today. 22th May buyer (I live in Brazil..)
Couple of things:
These are not so hard to drive, so don't freak out to buy a super amp or dac. I have a Asus Xonar DG, a simple sound card with an amp and I've got plenty of power. I will try with other devices if I have the chance, but so far I'm very satisfied.
The clamp force is high, but its confortable.
The pictures can deceive, but the headset really seems to be very sturdy...