I have one -- not this particular one but a similar product. Basically, it's great as an elaborate pitch pipe, or for some simple sightreading, but not much else. The touch is pretty much non-existent and in some ways very annoying. As I said, great if you need to give pitch while rehearsing a choir in a pianoless room, or if you're travelling and need to run through some accompaniments in the hotel room, but forget trying to play the Revolutionary Etude ... or even the Songs Without Words
