I bought this pedal not for a piano, but for the continuous controller on the right pedal. Realizing I broke the warranty I rewired the internals and now it controls the volume of a Zoom B3 pedal, giving me a gradual boost when I need. Being a keyboardplayer switched to bass I'm far more used to a pedal under my foot then a volumecontroller. The other two pedals switch through the patches, couldn't be happier!
It's very solid build, believe me, I took it apart. Heavy construction, sturdy pedal housing and attachement. Great addition to my setup!