I got one last week. It runs off of a 9v dc adapter, or 2 9v batteries (I'm running it off of my Pedal Power 2). There is no "pop" wen switching, and it does exactly what it's supposed to. It give you eight programmable combinations. Of course when setting it up you need to be mindful of signal flow
(e.g. if you put a delay as 7, and a chorus as 8 you can't run the chorus into delay...only the delay into chorus -- and either one separately).
For $343, pretty neat.