I use it for a few years now! I spend a channel of my amp vintage type to another. I made another use. I plug my jamman on output A and an amp. On the output B, I plug in a second amp or I play solo.
I give a very average rating because the pedal can operate without a battery. Forcing disconnect whenever the jack to avoid discharging needlessly. When the battery is not great, the sound becomes disgusting, see more of her and can not change the channel. This pedal is probably not transparent. I'll see if I find something else.