We are on burber (spelling?)carpet and the pad is so soft the chair creates deep marks in the pad which take a great amount of time to raise back up. The old one I purchased from your store about 10 years ago was fine---it held its shape like it should. This one will not last very long.
We use these for our home offices. While they are necessary to protect the rug it is also expected that you need to replace every 2 years becuase they do crack over time.