The heater is lightweight and easy to use. I keep it running on the lowest setting on my Cirrus SR22 while it's in my unheated hangar and the engine stays warm to the touch, even when the outside temperature is approaching O degrees Celsius.
The staff couldn't have been any nicer at Aerotherm. I had a trip "up north" coming up and needed the heater ASAP for my new SR22. They were able to arrange second day air for a reasonable price and it arrived in time for my trip the next day!