Hello, i have used this in about -10c , tho i have been camping in -20f and used a hammock . This is about the same as any hammock, tho i never use a under quilt. I use a closed cell foam sleeping pad, a 15 dollar one and my sleeping bag. That is it and i have woke up a couple times in very cold conditions alil chilly on the back, so i aded a thermorest with it and havnt had a problem since. I bought the thermorest at a surplus for 10 bucks. So use both for comfort and warmth these days. I have a few vids on my winter camping, tho just sleeping pads and sleeping bag. As for condensation, that depends on the weather and how much you prop out the front. I have woke and had frost on the inside tho once, other days nothing. Hope that helps. Tho i do and would use this set up in any weather and temp. NEW Pea pod tarp shelter in a freezing rain storm
check this vid out might help ya out.