My shop is 500 sq ft with a 12' ceiling and this heater had it at 65 degrees in about a half hour while the temp outside was 29 degrees. Very comfortable for me and the thermostat works well, just as described. Just understand that you have to have a 240v, 30 amp circuit for it. Even if you have to have the electric work done by someone else, it's really worth it.
Pros: Easy to Use, Easy to Install, Looks Great, Good Size & Weight