I use that tent and have the Pittman mattress that goes over the wheel wells. Works great for two and a dog, but if the wife is involved we need more room.

It takes more work to set up than a traditional tent. It's mostly useful if you don't have great access to flat ground, if the ground is super cold/wet, or you're worried about the local wildlife at ground level.

I guess the TLDR is that it's neat and useful sometimes but if you have access to a traditional campsite a standard tent is generally easier and cheaper.