Hi guys,
A few months ago I started using a program called DVD Ripper Platinum for PC and it has been the best software for ripping and encoding to several formats. What sold me is that it is extremely easy (2-3 clicks) and it rips ALL commercial dvds (even Disney ones with the new protection).
There is a mac version of the software, but I have not used it. The only think I have observed is that is lacking some minor features that the PC version has.
Here is the link:
http://www.flash-video-soft.com/dvd-ripper-mac/
Its not free, but I can assure that if it works just like it does in the PC, its worth every penny.
I'm planning on using the PC version (since I already bought it, not buying it twice!) in a mac mountain lion running parallels 6.