I had a problem with the mixing valve and they replaced it immediately.

After replacing the existing valve that was leaking with the new one we ordered, same make and model, it leaked in the same place changed the cartridge only still leaked . At this point the owner asked us to remove it and they would find another valve to replace it with.
I have tried repeatedly to call and email customer service and never had anyone answer or email me back. Customer service is not only terrible but nonexistent