So far I have the Verbatim DVD-R Double Layer blanks used and did not have a single failure in the first round 25-30 pieces. Even some minus blanks from Sony have never caused problems. Unfortunately minus blanks are hard to get even, so I switched to the Plus version of the same manufacturer. And there is an average of about every 4th blank "burnt", that is the burning process aborts with an error message that does not help. This is at best average quality, therefore only an average rating.