Regarding my upper area floor mats, I've pushed hard on them with my foot getting in and out and they don't move. The mats have those cleats on the underside to that helps, but more importantly the mats were cut exactly to the trapezoid-shaped area and since it is wider at the seat and narrower at the front, the mat cannot slide forward. I spent $55 at auto anything.com ordering the extra set of mats. Was hoping I could get 2 cars worth and donate a set to a local Roadster owner, but you can only get 1 car out of them.