50 amp cheater

We have one and have used it at any campground that has a 30 amp plug. Ours is automatic and only boosts when it's needed. We are hooked up with one now and have used it all winter. We are running the water heater, frig and a 1500 watt heater (when it was cold) as our electric is included in our site rent. We do try not to overload though and do shut the frig off when using the convection oven or brew coffee. The cord on it is long enough that the actual device can sit inside a bay and is not visible. We purchased it when we were workamping for a summer and stuck on a 30 amp site that had low voltage and was causing problems. We couldn't run anything on electric, not even just 1 air conditioner. It worked there to solve the problem. Our unit was around $500