I've played only about 8 hours in my black/blue glow 2k12's. I was a little disappointed at first because they were REALLY stiff compared to the V9. I was about to give up on them because they were too stiff.
Gave them one more try tonight and they seemed a lot better...they seem to be loosening up. I can tell the soles are going to last a long time compared to the v9, too. Nice.