I received this heater as a gift, and am glad I did. It was easy to assemble, starts up quickly, and throws off an incredible amount of heat. My 3 car garage was over 40* within an hour of running the heater, and it was 5* outside. It's mobile too, with wheels and a long hose you can place it where you want to. And, if the unit gets tilted or tipped over, there is a safety shut-off. All in all, a fine heater.