A chair with rollers in any one spot for more that a few minutes on this chairmat develops a sinking spot. It is not thick enough for a chair with rollers on carpet. I weigh 160 and my chair is around 25lbs. That should not happen.
Shipping was easy. This mat was easy to handle and put down. Second one in about 6 months. The first one from [@] store lasted about three weeks then it started to crack badly. It was very stiff and hard to handle. This one is much better. I really like it and would recomend this product.