I'm also curious on how the expensive car mat fares nowadays.
I got my Trapo mat when they first started in the early days. There is no velco below but some kind of spiked netting to grab on the carpet below. Mat still moves a bit but better than nothing.

But one thing I'm not sure if it still happens for the recent version, my car always parked under the hot sun so the interior can get very hot until some of my plastic cards can get deformed. So, since the top of the mat is made out of foam like material, it kinda shrinks a bit under the heat after a long time. The bottom layer which is the net like plastic material which doesn't shrink easily. This ended up the whole mat curved upwards a bit like a u-shape. Still works fine but doesn't look very pretty at the edge of the mat though.