I've heard good things about Fair Use, if you want something that is a hell of a lot better/ faster than Flask, and simple then learn the DVD2avi/ vfapi/ Virtual Dub method of encoding.
Use FairUse if you want better compression/ results and don't mind the encoding time and want something very simple.
If you want to be 133+ then use nandub. If you want a newbie program that will help you get started with nandub, then learn the Virtual Dub method above as nandub is just a hack of Virtual Dub. If you value quality over file size then also consider 2cd encodes using the original ac3 sound. (Use the ac3-pack/ Virtual Dub w/ ac3 from
www.doom9.net).
Flask is a total waste of time. It does a piss poor job of encoding, has horrible filtering options/ filters, is slow, buggy, etc... People say it is a "newbie" program, but a newbie program should point you in a good direction. Flask is different from any good program I know of and most of the learning you do in Flask is a waste of time because of that. A good direction if you want to take it slow is the dvd2avi/ vfapi/ V_dub method, then graduate to the nandub method. Nandub supports Ac3 encoding very well.... better than the V_dub with ac3!