Wow!
Most of the responders forget that it is an "arranger" keyboard that is being played(you know,for doing your own arrangements on),and therefore the demo is the player's own arrange-ment of the tune.

The old saying," Criticism is the unconscious tribute mediocrity pays to success" certainly applies here...or, in plain English,"if someone is trying to kick your ass...then you must be ahead of them"
I don't hear any of the critics posting their arrangement of this tune... if they are so ready to suggest how it should be played.
Ian