I ordered this to replace a complicated pedal board set up, because I was sick of tap dancing. The concept of being able to use Boss effects, plus switch in loops containing my other pedals and programming it so one touch of a pedal could select all manner of different sounds appealed.
Problem 1: The loops are 'joined' in the signal path, so you can't have loop1 (a POG) at one end of the signal path and then a few of the MS3 effects and then loop2 (a delay) at the end... the loops had to be together, so its not very flexible. Problem 2: Its really not very nice to program. I'm sure plugging it into a PC and using the editor makes it easier but trying to set this up in a rehearsal room with the band was an utter pain, and was too long winded. I got massively frustrated and gave up with it.
Its nicely built, and the effects inside are very good - although the rotary sounds are nowhere near as nice as the Boss RT-20 which is ironic. Its quiet in operation and the switches feel robust yet positive.
To be honest, I've sent mine back - it didn't do what I wanted it to do and the operating system was a deal breaker for me.
To sum up - some great sounds, some great ideas but just not quite flexible enough.