quantum, nolimitz, i'm with you, these are excellent disks, I too, have never had a single coaster and i've burned about 10 times quantum. I don't know if you guys are aware but shop4tech has a coupon code good til' I think I read the end of July which brings the price of these Sonics down to .26 each for 100 pack, and even cheaper if you buy more!
I just bought another 100 pack yesterday, should have them by Tuesday.
ScubaStreb, those shop4tech Sonics have the "MUST001" code which from what i've read on many forums, are the best of them all. The other Sonics which stink have a longten code and an AN31 or AN32 code and they're manufactured in different plants apparently. Can't go wrong with these.