surge protectors

I have used both the Progressive Industries and the TRC SurgeGuard EMS. Currently, we have the Surge Guard hard wired. Yes, I have seen miswired pedestal power connections etc. Surprisingly enough I have seen many "low voltage" conditions usually a result of poor quality park wiring or too much load. It isn't worth it to me to take a risk of damage to my coach. Even if the damage would be covered by a 3rd party it would be a hassle to have our vacation ruined and the coach in the shop. I have used an Autoformer and surge suppressor for our RVs for years. I have seen a lot of strange things. In fact one surge suppressor had to be tossed because it was fried.