The chair mat itself seems fine. It was left in a folded heap on the porch in 100 degree weather - and over a week later it still hasn't fully regained its shape. I'm using on a hardwood floor - it seems to do the trick for the most part but slides around a bit and needs periodic re-adjustment. A bit overpriced for a piece of plastic.
This mat serves its purpose and saves the carpet but it’s actually much too thin. It was totally warped in spots where we sat in the chair and it happened the first day it was used.
the mar came folded. Although there were instructions on how to flatten it they don't work. As a result the mat is curled upon one end and wavy throughout.