The demos were all poor on Lionstracs site apart from the ones posted by Andy spiller in my opinion. He is a great player and far better than the other guy who they have to demonstrate.
The faults did't have anything to do with the sounds one bit. The MS just has a very poor internal sound set, simple as that.
Why do you think there have been no postings of styles to listen to over the past year or so? - because they are terrible! Why don't Lionstracs show at the big music festivals eg. Caister? maybe because they know their keyboard doesn't cut it with the competition out there in terms of sound and styles.
As I said above, this is definitely not an arranger keyboard.