I'm no Dampening-Scientist, but I'd be a little concerned about the strength of the 2 smaller pistons, compared to one main one.
It's definitely a unique design, but the wheel as been round for a long time too...
I would wait, and let some other guinea pigs test them out and publish some reviews before you buy. I'm not saying that they're a bad design, but I have a hard time believing that those are stronger than a solid mono-tube, and off-buddies have never complained about having to sacrifice extra travel in a lift for durability.
...but then again, they're "use 'em" guys, and not "show 'em" guys.