Great mat for the price. I was using a heavier desk chair and it did make large "divits" that were a little difficult to roll out of. I switched to a little lighter chair and it's been better. Definitely better than not having one but if I do wish I had invested in a little thicker mat.
Unfortunately I didn't fully understand the limitation of this chair mat as well as I should have. Once home I saw on the label "not recommended for deep pile carpets" and "protects carpet up to 1/8 inch". I didn't consider my carpet "deep Pile" but apparently it is and it certainly is deeper than 1/8 inch. Consequently the mat is so soft my chair leaves deep dents in it and I expect it will fail after a short time. I bought this to replace a chair mat previously purchased from Staples and that one was much thicker ( I now realize). That mat was not affected by the chair rollers and did not indent from them. It lasted several years on the same carpet and was of a much tougher material. A lesson learned the hard way.
For some reason manufacturers have made floor mats smaller than they used to - not giving you much room to roll around. On thicker carpeting this becomes a big issue. This mat is a little wider and longer so there is more room to move the chair and while not perfect it is thicker and the chair wheels don't create deep ruts into the carpet as much as a couple of other brands I recently tried. I will stick with this one and hope if holds up for a few years!