Powerful 4x4 Rooftop tent

Everything is cheap for a reason.

The question should be is "is it value for money?" or "will it last long enough to pay for itself?"

Something at twice the price might still be cheap.

That tent is the ARB simpson. Same as many other rebadged brands of the same tent.
Their price of $1490 odd is O.K. but not the best you'll find.
I bought the same one through bettadeals on ebay and got the tent,skirt and side awning for a little less than that price delivered to brisbane.
The whole kit has done the Simpson, Fraser twice and numerous other weekenders and is going fine.
Quality isn't the greatest out there and I've modified a couple of things, but they are very fit for purpose out of the box.
Good luck with your search.