|: : : I want to try one of these!
: : Probably you could also mount all wheels on the same side. I'd rather have them on one side than this strange arrangement.
: This strange alignment allows better turning....more like a quad.
I can't imagine this contraption turning like a roller skate. On the one hand, the wheels don't have opposing partners. I'd say that will be very strange when you shift your weight. I think it would feel like a suddenly changed wheel base. And on the other hand, it does not have steerable trucks. I think it would feel neither like a roller skate nor like an inline skate.