What is your opinion of this product?
This ABY amp switcher does the job I wanted it to do, and it does it better than I expected it would. The phase switch is exactly what I needed to get a Fender Tweed Blues Jr and a Vox AC15 to be in phase with each other. That was a pretty good instant gratification in one flick. The switching between amps (and switching to both amps) occurs instantly and without any trace of sound. The ground lift was needed to get my Blues Jr to stop humming whenever the Vox and Fender were both attached to stereo delay pedal outputs... or the Twin City with the lift switch unlifted. Didn't seem to matter which output the Fender was attached to, it was the one to hum... either using stereo pedal outputs or the Twin City outputs. But the Twin City's switch fixed that problem. The drag feature is useful. It actually does what it says it does. I have mine about 60% up. Using a stereo delay after the Twin City brings back the hum as expected since that un-isolates the isolation.