Well,
After 2 hours here are a few other observations:
You cannot mute tracks when playing a midi file.

You cannot change octaves of the right hand voice

There are no stereo inputs as on the Privia 300 model

Although the styles are very good, the Cymbals don't sound as good as the Yamaha models

If you buy this keyboard first as a good, portable piano and would like to have some arranger styles and the ability to play standard midi files from smart media cards, this will be a great keyboard for you, but if you want a lot of control over the styles and songs, you won't find these features on the Casio.
George Kaye
Kaye's Music Scene
Reseda, California