CompUsa special 100 CDR's for 39.95 and I have never made a coaster out of one or had one come back unplayable. I am convinced it depends on your burner, cause mine would burn a plate if you put it in there. The only frisbee I ever made was because my wife turned on a screensaver and it locked up. Other than that always burns clean on cheap ass CDR's and they play forever in the car, boombox, stereo, club. Anyway I have a buddy who has a burner and if he doesnt use the good CDR's about 1/3 will be a coaster.