It is OK at best. I have an NEC ND-3520A and used 100 pack of RIDATA 8Xs, with no problem, and I cannot remember having any coasters. However, the burn times were not the best 10 mins at best and 13-14 at worst. Then I bought some FUJI 8Xs, which happened to be Taiyo Yudens, and they burned at 16X, without any input on my part, in under 6 minutes. Also, the feel and the thickness of the DVDs were completely different. FUJIs feel like they are a lot better quality. So RIDATA might be decent , but you get what you pay for.