The mat doesn't work well at all. I have a low pile commercial carpet and the plastic is so thin that the wheels have formed a rut in the mat. SO I doesn't allow me to move the chair around.
This mat was to replace an older similar mat that had cracked with age. The new mat does not lie flat it wants to "walk" (move) on the carpet with every roll of the desk chair. The current carpet (rug) is thicker than the previous one so that may be part of the problem.
the product is supposed to remain in place on a plush carpet. it does not! i paid almost twice as much for this expecting that the little "grippers" on the bottom of the mat would be longer than the non-plush version. that is not the case so i am still constantly putting it back in place. not worth the money.
The mat wasn’t in a box and had been warmed in the delivery truck so it was pliable and laid flat right from the start. It works great keeping the chair casters from ruining our new laminate flooring.
I have carpet underneath a large office desk and chair and don’t want to ruin it. These mats are thick sturdy last a few years and are reasonably priced. If you have carpets underneath your desk chair this is a pretty necessary item. It has sharp grips on one side of it to adhere to the carpet (they won’t hurt it) so be careful when carrying it and laying it down. They are somewhat sharp but work well to keep the mat in place.