I got through half of it.  That wouldn't make me want to buy one.  Midi file was just o.k.  Didn't like the drums much.  And I KNOW there are better guitars in there. 
Demos never made me a believer either Don...
I buy it, play it, after that it's yes or no..
simple concept,....been keyboardless without an arranger KB 
for over a month and honestly I miss playing one.
Fingers crossed for the SX900,....new Keyfeel, Songlist, etc,
we'll see shortly.