Just got my pair. Initial impressions are:
Build Quality isn't that great, one of the metal bits on the side of the headphones with Fischer Audio on it, came off. As in, when I opened the case, it was already off . Also the back of said metal piece looks like it has some sort of green paint or rust
Comfort - These cans are tight, very tight, to the point I have a headache and my neck hurts. It looks to me that for you to not have any pressure on your head from these cans your head would need to be about 10cm wide. I've got an earring on my earlobe on one of my ears and whilst my old headset (creative fatality) pushed the earring back, these cans push the earring back so far that it is digging into my neck making it impossible to listen to them without taking my earring off. I'm hoping that in future it will become loose. I'll probably have to find a box that's as wide or wider than my head and then leave the headset on the box for a few nights.
Sound Quality – I've compared these headsets without an amp on my iPhone 4, on my pc without a soundcard and with an Asus Xonar DG. The difference between a soundcard and without is pretty big. But I may have to invest in an amp. The sound quality is definitely better than the fatality, its not lacking in the bass and seems to play everything quite well. I've yet to listen to it with a low bit rate track.
I'll report back once I've had this to play with a few more hours. But so far not exactly living up to the hype