My chair cause divits in the mat after only sitting in the chair for 10 minutes. They have not come out. Everytime I sit down in the chair it caused more divits then you can't move your chair. I got frustrated and threw the thing out and purchased another one.
This is the second mat I have to replace. Each one has lasted a little over 1 year before having many cracks and a large hole in the middle. [...]. The manufacturer website was not helpful in obtaining a replacement. I guess I'll spend 2x as much for one that might not break.
This product is great for my computer area because I have hard wood floors and the mat stays put but the chair roll well on it and it does not mark up the floor because it does not have any nubbies like they do for carpets. Finally a chair mat that I can use anywhere in my house.