I have had this mat for about 2 years. I work at least 5 days a week with my chair sitting on this mat. The mat protects the rug and allows my chair to roll more freely. After two years I need to buy a new one. As plastic mats in the past this one too crumbles. My next mat will be a higher priced rubber mat. "You get what you pay for" as they say.
After using this floor mat for only a couple of weeks it has indentations in it that stop the wheels of the chair from rolling smoothly. We just saw a chair mat for $10.00 less that was the same if not better quality at a major warehouse club.