I tried ALOT of the diffirent DVD backup programs and in some cases they can deliver good results. But I usually had problems with audio being out of sync, etc.
So after doing lots of research, I found the free program Handbrake, which can be downloaded here:
http://handbrake.fr/
It can be super easy or you can go advanced on it. But the most important thing is that it delivers great results. Audio is synced, Picture quality great, etc.
Check it out!