MALKYMALKY  it manages with most dvds. however rip wit mtr first and it's fine. it burns well on external drives, unlike popcorn and dvd2one. the compression engine appears to be quite good. it doesn't appear to suffer from darkening the picture like dvd2one. it is also quite fast on my wee ibook g4. the only thing i could complain about is that there is no option to switch off the preview screen. if they just had a progress bar and tightened the code it might use less resources. having said that it isn't a huge resouce hog. i use clonedvd2 on my pc, still there is nothing quite as good macwise yet.  
(Version 1.0.3.0228)

MALKYMALKY  This is an excellent work. It works really well usually however with 1.4.5 it freezes a bit when loading up my zen. I have the rare plain zen. no plus or micro or photo. It is a zen 20gb which was available fro about a minute in singapore, us and online! If XNJB freezes you haveto reset your zen, not a big problem just a bit annoying. 1.4.4 was fine however! I have reinstalled my iBook and still the same issues. Hopefully 1.4.6 won't have this problem. I have used this from 1.3.5 and this is the first time this has happened. When sync is implemented and fixes have been added then this will be the best on mac and pc! mediasource and windows media player for zens are big and slow. Zen media explorer, the windows explorer add in is just that an add-in, it confilcts with some removable media. The only thing they have over xnjb is the tag editing.   
(Version 1.4.5)