I've had great luck with the coctail of RipIt4Me, FixVTS, DVD Decrypter, & Shrink.
It sounds like a lot, but it's easy. You essentially use RipIt's wizard button, which steps you through using each of those programs. Whole process takes me bout the same time as Shrink would on its own if there was no encryption. Haven't had a problem backing up any of my or my kids movies yet using this method. Best part? 100% free programs.