My chair cause divits in the mat after only sitting in the chair for 10 minutes. They have not come out. Everytime I sit down in the chair it caused more divits then you can't move your chair. I got frustrated and threw the thing out and purchased another one.
Thickness is my concern since computer chair dents it so easily even though chair rolls okay on it. Recommendation would be for those seeking a budget mat.
I use this product at home and for the money it is not that good I had another carpet saver that was better and I feel this will not last near as long as the other one.