The biggest omission is in the arranger in all Casio keyboards...you can't play "on bass" or "slash" chords(i.e. Dm/G) when in split mode.This has never been addressed in any of their auto accompaniment instruments;all other arrangers Yamaha,Roland,Korg and the recently deceased Technics provide this very necessary feature.
No matter how inexpensive it is,without this ability, it is useless to most pro players and more in line with the beginner or hobbyist.
Ian