Chairmat is way too thin. A chair makes depressions & your stuck & can't roll. Eventually the depressions will disappear. I am only glad I was able to buy two these mats while they were half price. I wouldn' buy another one though.
I have bought several mats like this at the same Staples store over the years. This is the worst one. It was also the cheapest. So no shock there. The last one I bought was the premium one for about double what I paid for this one. It lasted several years and worked much better. This one has had curled edges since day one. Don't buy this product.
The chairmat seems nice. Too bad Staples ruined by sticking their shipping labels right on it... after trying to dissolve the label adhesive for over an hour I gave up and called and complained. Now I have to wait another two days to get another one. Wanna bet the next one comes in the same condition?