I know the best kind are the ones which would be wired into the system, but saw this today and wondered if it would be any good. Is this a "better than nothing" or "you get what you pay for" situation...
I have used the PI surge protector for about 5 years with 2 different campers. It will tell you if a pedestal is miswired. I also have a volt meter plugged into an outlet. This is minimum protection. I intend to install the PI hardwired version with remote display in the near future.