The online reviews seemed great, with a variety of options.  I especially liked the thermostat control, which will maintain the temperature once reached.  I was, however expecting more performance after reading the reviews.  It struggles to bring a 200 sq. ft. room above 70 degrees even after letting it run for 30 minutes.  I question how it would save on heating bills by heating individual room rather than whole house when it struggles for one small room.