Ok, I wasn't clear. The physics of it are different from a tonepot, but the feel of it is very similar.

I played it, but I can't remember if you can hear clicks while making changes. It isn't my style to change the tone knob while holding a note. Maybe it would make audible clicks if doing so, but that wouldn't be a problem I would have. I didn't notice any clicks, or at least any loud ones, while rotating it when plugged in but not playing.