Hi John
I have just converted a pedal board with these. You’ll see a long thread a couple below your post with the problems I faced but that is because I tried to do things on the cheap and used the hall sensors via MidiBoutiques Keymux64 and then into an arduino mega which is where I have encountered problems. I would suggest if you are using all Midi Boutique products you should be fine.
Essentially the sensors work really well although I need to do a bit of repositioning to make sure the magnets trigger the sensors at the right point but that is down to my not great woodworking skills rather than anything to do with the sensors.