That is slick? How much?
Pros: adjustable legs and of course the option for indoor OR outdoor cooking
Cons: soft water bladders over tanks. Sure they are a neat way to do it but messy to fill and move around (I'm thinking gray water emptying, mostly). Also, for all that ingenuity you think they would work out a better bottle mount than that old fashioned bent arm bottle hanger/regulator dealio. A flexible hose give you a lot more options.
Currently vanless. Weird.