Sure, I have one and have spent several days at a time in it.
If you think about it you can get a single adult or several children sleeping area by laying transversely across the midgate.
I am happy with it. Plenty of venting and I like having access to the forward storage area (the back seat area through the tent back door) and the "shelf area" that is created by the side saddle storage areas.
The best advantage is that you can protect your valuable stuff instead of leaving it in the ground based tent and hoping other are honest.
Close the back midgate area, put your valuable stuff in the cab of the AV and lock it up. Makes going on a day hike easier on your mind.
I like to keep as little in the tent area as possible. THis way if you need to make a beer run you pull the mattress out, release the straps of the tent, and lift it off. Just sit it on the ground and make your run. Pop it back on when you return.
The best advantage with the AV tent is that if it gets extremely hot or cold, you can warm or heat it up with the vehicle.
What needs to be changed.
I think the fly needs to come further forward than it does. You can't vent the tent through the front during anything other than light rain. A rain fly and pole set helps create a "porch" area. I am thinking about working up some kind of entry "room" so I can stand up and get dressed. (Not really a problem with the AV tent but all tents in general.)
The second is that the step up from the ground and tailgate is rather high. A standard Igloo cooler makes a good step up.