First the mat was delivered 2 days late. Once it was delivered it was extremely dirty. After a couple of weeks of use I am very disappointed. This is definitely not for high pile carpets. The "cleats" do next to nothing. I constantly have to move the mag back into place. Also it dents extremely easily and can be hard to roll out of the dents in your chair. Would definitely not recommend for high pile carpets.
The plastic is pliable but it seems quite durable. I did think it odd that the chair mat arrived without any kind of packaging. Staples simply put a shipping label directly onto the mat itself. It had a few footprints on it but at least it wasn't hard to lie flat as I've heard other mats arrive rolled up and then it's hard to keep the mat flat for a few days.
My initial reaction to this mat is very favorable. It arrived flat and had no odor at all--issues raised on some of these mats. The chair wheels do create dimples but they smooth out after the chair is moved. I have medium pile carpeting and this mat seems heavy enough. Time will tell how well it holds up.