Try burning them at a lower speed, I've bought really cheap ones in bulk several times before (ordered 400 once and sold some of those to friends) and never had any real problems. Infact I'm not sure they even fail more often on my burner than branded ones, when they fail its usually something I caused (like bumping the comp, or having another program trying to access the burner, ect). My burner is only 4x though, so you might try buring at much slower speeds.
In my expierence the cheap disks just either scratch easier, or the top layer flakes off very easily.