I have used the Surge Guard Portable 30 amp now for two and a half years and it has worked fine. I would also not get a hardwired unit unless it has a bypass in the event it experiences a surge as one that happens these units are useless. The Progressive can be "reset" but must be sent to the factory to do so. The Surge Guard gets tossed. When I got mine the Surge Guard only had LED readouts. Now they have a digital readout. I have heard as many good and bad things about each so deciding which one is a coin toss. I have seen more RV stores selling the Surge Guard which is not an indication of anything, but it is more available for purchase without having to purchase on the internet.