We still have our Surgeguard. It has protected us from surges a few times and also bad campground wiring.
But..we bought the auto former and had in installed in the cord compartment. In AZ at Relatives where we were hooked up during heat of the day the voltage would go down into the red. Brownout will destroy electronics and motors. Since installing it we saw a few times on the line even with it but it stays mostly in the 125 volt range. However we have seen it at 130 volts for a while with no reason. We may have to send it back because of stuck switch.