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.
I went shopping for a chair mat to supplement the one I already had in my office. Staples had a variety of mats in different price ranges and qualities to choose from. all nicely displayed so that I could compare them and pick one that would work and be compatible with my underlying carpet. Not damaging the pile on the existing carpet was important to me as the mat was to be used in the office of my home rather than in a commercial setting. The sales person was particularly helpful in bringing up points that I wouldn't hsve thought of.
I've lost count of how many of these I've bought over the years. The "lifetime warranty" implies they last a lifetime but I get only about 2 years of use before they start cracking and breaking.