I just used my 12x12 alaknak in e.wa in 7 degree nights, with highs to 35, for five nights with two others. We did get the condensation that was mentioned, actual pools of water that would turn to I've when we let the stove die down. Used a four dog stove and could easily get 85 degrees in the tent. Would last about 3 hours then would add more would. We were using pine which I don't think I'd optimal. Overall, love it. I can take down and set it up solo.