I'm still very much a student - but yes, it is a hoot! It's built like a piano and plays very similarly, except your hands take the treble and your feet handle the bass.
It's a very physical instrument, and playing it makes people feel good. I think it has something to do with the vibrations or the harmonics or something, but it has a definite noticeable effect on players.
Consonant harmony - Mozart effect in play here, I'd imagine, as well.