I liked the size of the mat as most of the others available are too large but the quality was poor. There are already indentations from my office chairs's wheels and I've only owned the mat for a week.
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.
Material is soft so I am hoping that means it won't crack like the last protector I had but the softness makes it difficult to roll your chair on when seated as your weight creates dents in the surface.