The chair mat works as advertised. Since it is curled by the manufacturer it takes a bit of maneuvering to get the mat flat on the floor. This is the second mat that I have had to purchase in two years. Over time the mat becomes brittle and cracks begin to appear. This makes sliding a wheeled chair over the mat a little difficult. Based on the frequency of my purchase I would say that the mat is overpriced. From my shopping experience it was the only mat available in the store unless there were other mats on display elsewhere in the store.
The chair mat works well but cracks after a year or two and has to be replaced. I have bought several over the years. As they are not terribly expensive it is a good investment