Yes, it's pretty nice. A tip that was not obvious to me is that while "dvd://" (aka the whole dvd) as the input source tells tablet-encode to make its best guess on the track you want it to encode, dvd://1 will tell it to only copy the first track, dvd://2, only the second track, dvd://2 dvd://3 will tell it to only copy tracks 2 and 3 (and call them 2.avi and 3.avi in the output directory you will need to specify). This will prevent issues where tablet-encode guesses wrong.

You can examine each track by running
mplayer dvd://1
maplyer dvd://2
etc.

to decide if you want that track.

To pause mplayer press "p", to exit press "q" I usually pause then exit although I don't know why. Probably something left over from vcr usage where mplayer's pause would be a vcr's stop and mplayer's quit would be a vcr's power off.