That is a neat design with the pull out section forward expanding the interior space.
These are an interesting nitch , more than a tent, barely a camper.
I do like the look of them.
Saw this beautiful home made wooden one.
But at 15k. That's 2/3 of the cost of my motorhome.
Similarly this sprinter based airstream interstate at almost three times the cost of my coach and S C tow vehicle combined seems an interesting choice.
I do envy their 18/20 mpg!
Sure am glad that fuel prices have been low for my long summer trip.
Cheers Richard