I picked up the NU DDW163 in late December. It's been a dream; burned my way through 100 or more, all using G7P9.
I've read conflicting information, though, about voiding warranty flashing to "B" type firmware, so I've kept to "G" for a while; besides, P9 is doing just fine on the cheap media I'm using.
I had some 150 CD-R blanks my father gave me, which he purchased in bulk (maybe 1,000) for himself. They are CMC-Mag, and would not burn any faster than 4x on my Memorex 48MAXX. The BenQ produces a great CD-R burn on these at 16x (cd speed, mind you).
So far, it's been the best $60 peripheral I've purchased, ever.