Interesting concept. Of course they show 2 people acting like they are having the time of their lives using it.
I've tried camping out of a minivan, and it was a pain to battle the camping 'stuff' that was in the way when trying to get ready for bed. Having space for the stuff underneath the bed would have helped, and I suppose this box system is one way of handling that. I bet a creative person could come up with a less expensive version, homemade.
Still there's nothing like having room to stand up while dressing/undressing, having good window coverings for privacy when desired, and the ability to do the things shown without first constructing pieces. Aahhhh, home sweet trailer!
To every thing there is a season, and a time to every purpose under the heaven... --Ecclesiastes 3