So I finally broke down this year and upgraded from the old shappell 3000 box style shack and bought a 4-6 guy clam thermal. All I can say is wow what an upgrade in comfort. Tough first day to set it up at 3 degrees with 30 mph winds but once it was set up and got the heater running on low within 10 minutes that baby was toasty warm and I had hat, gloves and jacket off and was jigging away. There is no way I would have made it in the old shack without practically freezing to death. Now I must ask my dumb self why I did not buy one earlier...