The design of that tent looks nice, I really like the fabric floor pan design, it seems much better than traditional solid ones. I wonder if it would puncture easily though, and if the tension on the fabric would spread the tear and cause a catastrophic failure?
This is just my personal opinion but I really think RRT are a terrible idea.
1) They Kill Fuel Efficiency
2) They raise vehicle center of gravity making high speed or off-road driving performance significantly worse
3) They are stupid expensive, you could get multiple high end tents for the cost of one RRT
4) They are heavy and a pain in the ass to take on and off your car
And last but not least, if I am not sleeping in the comfort of my home and I am already going camping, why on earth would I want to sleep on top of a bunch of gasoline and chemicals? I would much rather take the 5-15 minutes to setup a tent, make a campfire and sleep away from my vehicle and closer to nature.
There are some really amazing tent designs and innovative, easy to setup, designs (if poles really bother you) that can be had for a fraction of the cost of a RRT.
These are not exactly cheap but this is a german company that makes inflatable tents that are really nice
https://www.heimplanet.com/