mattwnz: I had an older version of a WD media player, and had to return it as it wouldn't fast forward videos properly. Instead it jump all over the place. Also the interface was laggy. Not sure if the Live version is any better, but I would buy from somewhere where you can try it out first to test it, and return it if you need to.
I'm on my second wdtv. I've got current and previous model. No probs with either.
On occasions video slightly stutters, but by swapping the video set up (easily done) fixes this. Auto mode works fine with most files, however sometimes I need to manually swap into 60htz for American origin files and 50htz for English origin files.