Most digital pianos do not have pitch/mod wheels, so if you are a piano player, and want to be able to pitch bend voices like guitar, sax (which are on the module) you would need some way of doing it.

Since the module is generally mounted on the left side of the piano, the wheel/bender/joystick would fall easily to hand.

I just think it would have been so easy for Roland to provide even a pedal controlled bender as one of the foot-switch functions, since this module is advertised for use with a midi-capable piano.

I do know that it is a deal breaker for me and several other players I've been speaking to who were considering it for use with a stage piano.

Ian