Depends what you're asking, I guess. The times I've been out in the hot summer weather it's been fine if there's a place to plug in the AC, hot and sticky if not. I'm probably the wrong guy to ask about winter, I happily came in a backpacking tent in sub-zero weather. Have used the furnace a few times when the wife's been along for winter camping in the TC, mostly I just leave it off. Would rather not listen to it and a down comforter provides plenty of warmth.
The big thing I'd worry about in winter is freezing pipes-- I just don't trust the designers to have come up with a system that would really not freeze, especially when it's 10-20 deg outside and maybe 40 inside or while you're driving down the road. So I leave the camper winterized when using it in cold weather. It would be nice not to have to go outside in the snow to pee.
