Does anyone have any experience with Weather Tech's Tech Flooring?

http://www.techfloor.com/

I ordered samples of the water flow through versions of both Tech Floor and Race Deck. Tech floor is a little thinner and has non-skid rubber squares for traction. Race Deck is thicker but doesn't have the squares, although, I don't think you'd need them. If I went with Race Deck I would probably put landscape mat under the Race Deck floor to make it quitter - I have a 4 car garage so I'm being a little cautious.

I'm wondering which is more durable and which will expand and contract less?

Thanks!