I'm biased because I own a few Tepui products but I'd say go for it, you won't be disappointed. The travel cover works great, I keep my sleeping bag, bedding, pillows, pjs, you name it in the tent while it's closed up and it's always dry in there when I set it up. I just pop it open and crash out. As far as moisture building up I can't really speak for that because California is really dry except for the occasional rain storm. But the tent and travel definitely keep the weather out from what I've seen from my use. If it's cool out and I need to "dry" the tent, I usually just put my Mr Buddy in there and let the tent get to 70-80 degrees for an hour or two.
On a side note I'm not sure what it's like in your neck of the woods but over here you rarely find used RTTs and when you do they're only a few hundred bucks less than new and they sell right away. I figured if I didn't like mine I'd just sell it after a few trips, a year later and I love my tent still.