Ritek Ridata's, hmmm, they all seem to be full of errors at the end of a a data burn, not just the odd disk, but all. Audio seems Ok though, but not 100% perfect
I for one will not be buying anymore
If you are looking for CDRs of about the same price, try the new TDK 52x bluetops.
Only thing with these is they come out of three different places, Mitsui, Moser Baer and CMC. I have done CD Speed tests on all these TDK types, and they come out 100% better then the Ridata's.
Disks where burnt with a Pioneer 108 on a Mac, then tested on a PC using Nero CD Speed.