I burn with a Pioneer DVD RW DVR-107D with 4X! To be brief me: So far I have 3 of the 50 Platinum spindles bought (the 4th is ordered!) And had no single committee. Why other Rezesionen prove negative here is beyond me. Because I had problems so far only Sony or TDK products. But no matter. I am glad to have tested the blanks. Because the price is more than fine with the quality!