Had a serious n Idaho elk camp I socialize with use one this last season and it was a failure. It was the one the safe company sells at the Big Horn Show. It burned fine however it would not put out nearly enough heat. I have since heard the same feedback multiple times as I researched whether I wanted to go down this route with my wall tent. All feedback was the same from independent sources, not enough heat.
My input would be to consider how you can get the most heat radiating off it.