Best thing I have purchased I think. The downside is my jeep has a hard time with highway anyways, this is painfully slow now. My gas mileage is about 15-18 mpg fully loaded now which is highway and off roading included- used to be 24 highway. It is large- had a few people in it, holds up better in winds even without the tie down straps, and is just a pleasure to camp with. After hiking 10 miles in the summer, Utah heat- and driving about 5 hours on washboards, 4lo, highway, etc, it is so nice to quickly open a flat surface with a cozy sleeping pad and go to sleep looking through the window at the stars with NO worry. Not really dirty and they stay clean, no ants, snakes, scorpions, spiders, flies, and it feels more secure even from ground critters like mountain lion and bears.
I always joke with my freinds, it takes me an extra hour to drive from Salt Lake to southern Utah, but I am still in a better rig offroad and for the 8 hours of sleep I get in comfort, I make up for any disadvantage in highway speed.