Below are the criteria used to evaluate DVD Ripper Suite for Mac and DVD Ripper for Mac:
Speed - Ripping DVD, Copying DVD or converting video should happen at a reasonable quick speed.
Quality – DVD Ripper Suite for Mac should rip DVD and convert videos with perfect Video & Audio Quality.
Easy to Use - It is true that the fewer the number of click, the easier the DVD Ripper Suite for Mac is to use. All DVD Ripper Suite for Mac should be easy to use, even for beginners.
Software Stability – DVD Ripper Suite for Mac should work without error and ought to complete each task without glitches. The program should also work well with other programs, such as DVD players.
Feature – The best DVD Ripper Suite for Mac programs offer a wide variety of features.
Support - Having multiple forms of help is important. Great help and support is essential.

Source from:
http://dvdrippermac.bestdvdripper.net/