These are great..they protect the carpet in my office. This is the second set I have purchased as the first set finally cracked after approximately 10 years. Well worth the price.
The only concern we had is that it is a bit softer than the previous mat for my husband's desk chair. He did not roll as freely using this mat. We solved the problem by swapping it for my older rigid mat which holds him well. I am easily accommodated by the new mat but I weigh 105 vs his 195 lbs.