These mats are pretty sturdy and plenty big. They're billed as "limited lifetime warranty" and I had one that developed cracks. Staples replaced it and I now have a new one.
I bought this chairmat for my 90-year old father in law. His was brown and falling apart so he was delighted that we found one that would save his carpet and make it easier for him to move his chair.
Not necessarily the products failure. After one floor mat returned that was recommended by the store (one for wood floor even though I told the salesperson I had carpet) this product was recommended instead. But it too does not work with my carpet. Should have been one for thicker carpet. Perhaps the store didn't have the one I should have and so they sold this one. NOT HAPPY !!!