Just got my 6-man and medium stove setup. Am VERY impressed. Its been about 5 below here, bit of wind, the medium stove gets it up to 90 at face level, even 40 a couple inches above the snow. Amazing. Yes, one has to feed the stove frequently, but there is a learning curve there, am figuring out when to put in the bigger stuff, how much I can stuff in without smothering it. When it is going right, there is no smoke at all from the pipe, just shimmering heat waves. Frost does happen, and in the morning when the stove starts cranking, it turns to water, which will fall on you, but somehow it does not seem to be a problem when there is all that warmth. Not at all like sitting up in an icy backpacking tent and having it fall in your face while putting on your cold boots. Also the stand-up room is just wonderful, just turned 60, and most of you probably have no idea how stiff one can get even on a good pad, if you just are horizontal for hours and hours.Also, while the stove needs frequent feeding, it really doesn't use all that much wood - a pretty small pile lasted all evening. Trying to keep an outdoor campfire going hot enough to be adequate in subzero windy conditions takes a whole lot of wood. Glad Patrick thought outside the box on this one, glad I ponied up my Alaska PFD for it!!Am also really looking forward to summer canoe trips, like the idea of pitching it, then stepping inside to do the unpacking.