Exactly what it claims to be
I picked one of these up after doing some online research, having never owned a Fulltone product. I use it to run a two amp rig with a KSR Artemis to the left and a 65 Amps Whiskey to the right. The pedal worked flawlessly. Top notch quality, silent switching, the soft touch switches are smooth and function perfectly. The options for buffering, phase and ground are also all present, exactly what you'd expect in a higher end ABY, especially after having used a more "affordable" ABY from another maker some years ago with an old rig with less than thrilling results. It was worth the extra coin. Now Fulltone has me considering some of their other offerings. If you're looking for the switch to select between two amps, or run both together, just add it your cart and quit wondering. This is the ONE.