Does not work well on medium pile carpet. The supporting studs that penetrate the carpet pile are too short resulting in dips and sagging under the chair wheels.
This mat is simple & does its job. Yes it did come folded & dusty when delivered. But the instructions say to let it set in room temperature for 24 hours. And after a few days all the wrinkles were straightened out!
It laid out easily and the chair moved freely while no one was sitting in it. As soon as I sat in the chair the wheels formed indentations on the mat and made it more difficult to move than if I had been sitting on the carpet.
This is being used to help with a Hoyer lift for a person with Parkinsons. It works well. I need another one and will order. The aide likes it very much but we need one twice the size so I am ordering another.