A must have, IMO. And as Bebop says, if you're an old-school organist, it feels very natural tucked away under your left foot.

I only wish Roland would produce it without the currently labelling ("Fill to original", "Fill to variation", etc) which is at least a couple of generations out of date. It's no big deal, as you can assign any of dozens of functions to any one of the switches without restriction, but it bugs me a little.

Great gear for gigging, though. So flexible and useful in live performance. I'm always suprised other manufacturers haven't flocked to copy the concept.