Now if only those disks wern't complete junk
I have had problems with one of my DVD players not being able to read Ritek DL media, though it was burned on my NEC ND-2500A drive.
After I RMAed a bunch of Memorex DL media, I burned one of the replacement discs with my BenQ 1640 drive and that DVD player had no problems reading the disc. Not sure if they just sent me some "higher grade" Ritek media. Or if that 1 disc was really good. Or it was the combination of BenQ 1640+Ritek DL media that made it work, but I was pleasantly surprised.
When I have the need to, I will burn some more of the media on my BenQ and see what happens.
The CDSpeed Disc Quality scan came out "okay" on the media. I think it was like 85 for a total score.