I think Al might have been talking to me about it, i got one off here last week
I dont think ill use it much, but from what i have seen its really cool. In the AS each preset has two separate tone engines. You can program them to stack, use just one, one for each output socket etc. If you use the Tap Tempo you can program the preset to allow the TT to switch between each tone engine, but still only use the mono out. Effectively two pedals in one. you can have one on all the time, and stack the second tone, either while you hold the switch down, or latching, or switch between the two. Ive not yet found a way to actually switch between each of the 6 different preset slots (3 on the toggle switch, 3 preset in red mode). I dont think you you can, but if you could, that's a lot of options to try and remember.