At work using many NEC 1300 drives to burn to many types of dvdr media, mostly +r, we have had no problems. There were some issues with dvd-r media but that went away with firmware 1.06/1.07 (the same anyway).
Thing is, using 3 drives with a few types of cdr media, we have had little success.
Media used is Mitsui Gold White Type 74/80 min type and other cheaper media. Either the record process starts and finishes with a write error - by which time the media is trashed, or the burn completes successfully but using CDSpeed scandisk there is a very large percentage of yellow blocks throughout the disc.
We have only had 3 successfull (all green) writes out of ten using 3 drives.
So, what are other peoples experiences with the 1300 and cdr media - those that actually run tests on burns that is.