I'm having trouble with it myself. I wouldn't be talking about Casio at all had I not played their PX-555 and liked it a lot. It's better than the earlier Privias. A friend of mine is renting the PX-555's out for people who need digital pianos for weddings etc. and he says that he's getting great response from everyone who plays them.

I'm hoping that Casio takes the PX-555 to a higher level in the future with more polyphony and features... but even as it is, I'd be very tempted to combine the PX-555 with something like the Ketron MidJay for live gigs. Guess I'd have to cover up the keyboard name like the guys on tv do (I've been tempted to do that with my Yamahas lately anyway...).