The mat is good saves carpet. However this is at least the third one i have had. After about a year they start tp crack. I used them on very low pile carpet as directions say. On a 1 to 10 rating ill give it a 8
I have had several of these chair mats in the past. They wear out and I understand that. This one although advertised for a low pile carpet which is what I have has nibs that are too short to prevent the mat from creeping across my study floor.