The tent is super warm, as it keeps a lot of body heat inside unlike "fly" tents. Unfortunately, the tent sweats a lot and my sleeping bag was completely to partially wet for nine days. Ice crystals were present every night and morning on the inside of tents walls no matter how much (within reason) I vented out to the vestibules. I used it for a late October Colorado hunting trip at 10K feet and stayed very warm at 15-20F lows with two bodies inside. Its easy to set-up. I would have paid extra for the seams to be factory sealed, as it was too time consuming for my schedule. I took pictures of the ice crystals and am debating whether to return the product. It's a huge benefit to retain the body heat inside the tent and therefore may outweigh the negative condensation problem. I'm sure that it is too much to ask for both warmth and dry tent walls. This is a decent product, but the fabric technology may not be available for what I had expected to receive.