I have had several of these over the years. In fact, just this week, we did a long weekend up in VT (the Pilgrimage) where we base camped, and went wheeling each day. We currently use a T4 Plus. Which is HUGE. We have been using that for a couple years now but, after last weekend, decided to "downgrade". Let me explain.
The footprint of the T4 Plus is about the same as my Tacoma. Both in length and width. In a campground, this isnt an issue. But, offroad, it could be. Having the front vestibule is a plus in inclement weather (or if you have kids, or pets, or both). The front vestibule allowed us to sit and relax during a torrential entire day rain storm, that ultimately caused flash flooding issues on the river we were set up next to.
As with all the other Gazelle's, staking this out is clutch to in not collapsing on you at the most inopportune time. It takes MAYBE a couple minutes to do. Better to do it while you are setting up, rather than at 3 AM with a collapsed wall.
As to the size of it-the T4 plus is the same as the T4, x2, with the front vestibule. Getting into the plus model is easier, with the true vertical doors. The only issues we had-and these are personal ones-is the bulk, and the weight. I put this on top of the truck, on a rack. But I think it weighs 60ish lbs-not easy to manhandle to the roof. The T4, which I just ordered today, after selling the plus, will be MUCH lighter to handle.
I agree that a daily set up and take down could become monotonous. But, the way I look at it, I am rarely in a rush when camping. Barring trying to beat the weather, I dont care if it take 5 more minutes than a RTT-er.
The only REAL issue with ground tents in general, is finding relatively flat ground. However, using cots-which we do-mitigates this to a point where, so long as the angle isnt too steep, we are OK.
Plus for the Gazelle tents:
-ease of setup
-simplicity
-weather resistance (I have yet to have a leak in over 3 years in these tents)
-visibility (on clear nights, having the rain fly off is nice)
-rugged floor
Minus for the Gazelle tents
-cost (but, I have seen these on sale more often than not, making them more affordable)
-size (these do NOT pack down small)
-weight (honestly, this is subjective, and model dependent)
-repairability (if you tear an actual wall, I am not sure how well a patch will hold, due to the tension of the fabric. Which could lead to water intrusion)
We discussed a RTT before, but decided against it. We are getting older, and ladders arent really our friends. Having to use the bathroom a couple times a night, just doesnt seem like fun climbing down ladders. You cannot stand up to get dressed. You cannot sit in the RTT in inclement weather, and play cards (certainly not with other guests). Also, we have heard from more than one ex RTT-er, that, on windy nights, being in a RTT, you rock CONSTANTLY, as you are pretty much an elevated sail. Thats not conducive to a good nights sleep. Pic attached for clarity what we WERE using (the T4 Plus)
Once we move on from tents, it will be to a trailer. And, thats about a decade out. Until then, we shall remain ground dwellers.