I purchased a 3r warmlite tent for my JMT trip several years ago with two adult two teenage boys (slender but tall). I am an outdoor sleeper and rarely use a tent unless I am getting rained on.
The four of us spent two nights with all our gear in the tent and had adequate room.
Although I have had condesation problems with the tent, it was because I didn’t read the instructions well. They have a lengthy explanation of how to use their ventallation system and how to prevent condensation. Part of their plan includes sleeping in one of their vapor barrier shirts which I routinely do anyway if it is at all cold (less than 30 degrees). The shirt keeps the vapor out of your bag as well as warming you immensely for its weight.
I wear their vapor barrier socks as well which keep my feet warm when they other wise might get cold and dry, when I am walking in the water or snow.
Using the proper ventillation and the vapor barrier shirt, I’ve not had problems with condesation.
The poles all broke around the ends because i did not follow the instructions. I was going to buy 200 dollars worth of new poles when the Stephanson sr told me to put strapping tape around the ends. I’ve had no furhter problems. The tent is very easy to set up once you learn how to set it up though setting it up is confusing the first couple of times.
I use a tyvec ground sheet underneath it mostly to protect the floor of the tent so I’ve not had any water coming through the floor. I’ve used it in the snow and rain but, incredibly, have missed the wind. I paid extra for the window option but have never used it. I don’t really stay in the same place long enough to need it.
In short, I recommend this tent and I recommend that all read the discussion of vapor barrier usage and ventillation whether or not you buy thier tent.