I see no redeeming qualities of that 'Carsule.'
Lets see, a spiral popup design that still requires poles? Fail. A popup tent that still requires poles that effectively takes your vehicle hostage at a camp site? Fail. I've spent countless nights in ultralight $$ backpacking tents days from the trailhead, and countless others in a good old fashion Coleman tent for car camping. I do not understand the draw to in-vehicle or atop vehicle arrangements.
If you want the roominess of the 'Carsule' but faster deployment speed, better weather resistance and less cost, the Gazelle T3/T4 is an answer for $280. The thing is a beast in transit though. It fits from the passenger front seat to the hatch, or propped, nose down behind the front armrest up towards the ceiling. I now fit mine in a Yakima Skybox 12. My wife and I unroll a couple Thermarest MondoKing mattress in the Gazelle, half hour later they're nearly fully self inflated. Couple stuff sack squeezes later, they're better than any 2" foam you'll find in most roof top tents. Speed, convenience, weather readiness, comfort and cost.. I don't see the Carsule hitting many, if any marks from my vantage point.