BY the way, the voiceworks doesn't HAVE to be programmed... that's just one way to use it. You can use other types of harmonies that are just as hands-off as the harmonies from John's device.
You can send chords from BIAB or set the key from the faceplate then just use the foot switch to turn harmonies off and on.
You'll like it. It is by far the coolest piece of gear I've ever owned.