I bought one last year, and only got it out twice. I'm a big guy and it was a little tite in there for me, but it worked out alright. I find you have to sit with your back to the wind, cuz if you don't the wind will blow the sides in so far, it will interfer with you trying to fish. As far as a heater goes, I just used one of those little cannister heaters. (Canned Jelly stuff) It didn't drive me out of the thing, but it did take the chill out of the air. There was snow on the ice both times I went out with it, so I can't tell you if the wind will move you or not. For me it would have to be a real strong wind anyway. lol Overall, I like it, and I like the fact that it is lite to carry, so I can get into some remote lakes up here. If they made the same thing about 6 to 8 inch's wider, it would be perfect. Hope this helps you out a little.