RipIt was able to successfully decrypt a DVD that Handbrake(with the VLC library) and Mac DVDRipper Pro (the REAL one, not the knock off) were NOT able to handle...both were only able to decrypt about half of the movie, stopping at the exact same point, so definitely related to the encryption scheme.
The DVD was a commercial DVD, released about 5 years ago, by a very well known studio, so whatever encryption scheme it is using, Handbrake/VLC and MDRP have certainly had enough time to figure out, but apparently haven't (I did report it to MDRP).
So thumbs up to RipIt in this case for being able to handle it, so I will keep it in my 'toolbox', although I think HB and MDRP will still remain my first options, and RipIt for those cases they can't handle.
On a side note, just a comment. If VLC Player is able to play the DVD fine, then why wouldn't HB, which supposedly looks for VLC and uses its code to decrypt, fail to decrypt completely?.