I just ripped a movie using some ritek DVD-R media (8X). It burned no problem at 12X and played perfectly on my ONKYO DVD player. I can't speak for fuji DVD-R media though. I think the consensus from the reviews I read were that the BenQ 1620 was great at DVD+R but the DVD-R still needed some work. I think with the latest firmware they have brought the DVD-R quality up. I know it works fine for me. Normally though I use DVD+R and booktype to DVD-ROM. I see no reason for me to do anything else. Hope this helps.
------Rolling beat me to it