I think Casio possibly made a mistake here with showing the MZ-X at NAMM. From the info I've seen it appears that the prototypes are nowhere near production level yet. It looks like Casio is rushing the prototypes to NAMM just to show the feature list (a mistake IMO). I think we are going to have to wait for demos of the production models. Had a friend attending NAMM email me this morning. Said it looks like the sounds and styles aren't finished in terms of effects settings, and the styles don't appear to have finished mixer/effects levels complete either. So..., looks like any quality demos will have to come later. Surprised Casio actually rushed a model. With the prices they are going to sell for Casio IMO is going to have a hard time justifying that with the prototypes.