It works really well in almost all scenarios, for example:
- if a guitar is connected in Y and it is outputting to A and B, it can output to either by changing with the foot switch or
- if you set the toggle to A&B in the above scenario, it splits the signal and sends it to both simultaneously;
- if you add two guitars in A and B and output to Y using the A/B toggle, you select with the footswitch and it works great.
- However, if you select A&B, it only outputs A normally, B is so weak that you have to turn up the volume to hear it. In my case, B is a guitar with humbuckers with a larger output than A, so I should be able to hear it. 4/5 stars in features for this.
Another useful feature is that you can use the pedal foot switch without power because it will still change between A and B; I guess you need the power to see the light in a dark setting.
Hopefully this will help others, since the manual is only one page, half being a photo and most of the other half is blank. Otherwise, it feels really sturdy and I don't feel any added noise or loud clicking of the switch. At this price, I'm very happy with it.