I've had mine for about 5 days now, burning in almost the whole time, and listening for a lot of it. Here's my opinion fwiw:
Sound:Originally I thought the bass was overpowering and bloated. Now less bloated, and overpowering, but still significantly elevated. Everything is sounding better after burn-in, but still disappointed.
Comfort: at first the clamp was unbearable. Still is, but it's better since I've been bending the head band. Also it still doesn't quite fit my head. I've tried bending and shaping but nothing. It is almost like the ear cups don't extend low enough on my head. These phones are quite painful with glasses (especially wire-frames like mine). Once again, a disappointed.
Isolation: Amazing. I love the isolation these provide at work. I can't even hear my phone ring. Some times my office can be loud, and these just drown it out. It's nice to have that option.
Portability: Nice. I like the bag, and it has enough room to hold my PA2V2 and my DAP. So it's good in that department.
Build quality: Seems quite good. One of the better phones on the market.
Verdict: I'd give these a C+/B- I'm not ready to sell them just yet, (mostly because of the isolation) so I'm gonna keep working on the comfort and I may try removing the foam for Sound Quality. I had high hopes for these (even after I received them) but they are just too uncomfortable to keep on my head for more than a few songs at a time without taking them off and giving my ears a rest.