If there was a zero star rating for this I would use it. It's a very badly made product. I used it for a week and it had several cracks and huge punctures in it. I returned it. DO NOT BUY THIS CHAIRMAT.
The thinner mats I had were fine on a non-pile carpet but they did not work on a pile carpet... they were moving side-ways or forward and backwards when I moved chairs on it.... thus tried this LOW PILE CARPET CHAIR MAT which is thicker but obviously does not work on a pile carpet either. It moves also but not as much. I will not continue buying these mats maybe will find a much thicker and heavier mat which is suited for Pile carpets....
I purchased this my second chair mat. They do last quite a long while. They are a bit harder than I originally thought but my desk chair moves effortlessly as I change positions at my desk. If you're so inclined to purchase one make sure you pay attention to the label attached to the mat: some are made for hardwood others for different types of carpet pile. The right style for the carpet you have on your floor will make a difference in the wear factor. I also believe the wheels affixed to your chair legs will affect the lifespan. The harder wheels will definitely wear the mat faster.
My 10 plus year old mat dried out and cracked where my chair sat so I replaced it with a new Flat Pile Carpet Mat. This is exactly the same size as the old one and it is an improvement in that it has has little nubs on the bottom which grip the carpet and keep the mat from sliding around. In another ten + years when this one wears out I will replace it with another like it.