This is my third ABY selector switch I have owned in the last couple of years. Seems to be working okay for know. I know that the first gig i used it for the A/B selector switch stuck in the down position. I had to pull it up with my fingers. After that incident it seemed to work fine for the rest of the night. I always modify these units by removing the A and B switch and sticking it inside the casing, so that I don't accidentally step on it. I'm usually singing and playing guitar when I step on this switch so I'm not actually looking at it. Only time will tell if this unit will hold up. The unit I bought before this one looked practically identical but had a no name brand on it and it cost almost half the price. The difference is probably in the quality of the components. It's made pretty rugged.