My Tepui Autana RTT.
VERY comfortable. Sort of a pain at times to get zipped up as I need to be on the roof to do it since the truck is so high up.
I just ordered a Kodiak Canvas vx series (side windows) 10x14 for a living room/hangout area in bad weather.
I was finding I needed some sort of retreat from mosquitos or sun in some camp sites and the RTT seems to be mainly for sleeping duties.
I also have a Snow Peak REctangle tarp and poles for those more lengthy stays. What an expensive item, but you can see the quality when you put it together.