Well, I have some cheap DVD-R discs (GQ brand), but the media id says its SONY08D1 which would equal 1st class, so I'm cool with that. Anyway, I was trying to backup Ghost Recon: Advanced Warfighter, and the disc is rated for 16x, but for some reason my burner can only write at either 4x, 6x, or 8x for this particular kind of disc. So I burnt the game at 4x, notice that the intro movie was skipping, and loading times were unbearable. Next I tried the gnie expert method of rebuilding just for kicks, burnt the iso at 4x, and noticed similiar results, very poor fps and skipping. Then I burnt the game at 8x and it works flawlessly. So a word of advice to you guys out there, sometimes you have to burn either at 4x or 8x. If the game is skippy at 4x, burn at 8x. Most games I did burn at 4x work fine, but I guess the more involved action oriented games with lots of fmvs need to be burnt at higher speeds.