I picked up a 25pc spindle of these for $30 CAD today at Futureshop today, and so far they've failed during the burn process (before the layer break) on my BenQ DW1640 and BenQ DW1650, both of which officially have 8x support for this media (but burned it at 4x only!). I've almost completed a burn on one of the discs at 2.4x in my Pioneer DVR-111D running firmware 1.29 though.
So far, I'm VERY disappointed...
The Burn completed on my Pioneer DVR-111D at 2.4x. I'll post a scan later. It turns out my LiteON SHW-1635S has proper 8x support for CMCMAGD01, so now I'm trying to burn it on that. So far the disc is already burning at 6x, and may still make the jump to 8x
More info to come when I have it!