The chair mat was fine.....it came folded and I set it out in the sun with weights on the four corners. After about an hour it was flat. I don't know what I would have done if it was not sunny that day!
I was hoping this would work in my home office as I didn’t want to spend a lot due as this is a temporary work arrangement. The wheels of the chair actually dent the mat without even sitting in it. Then when you add your weight to the chair it is very difficult to roll. Might as well keep it on the carpet. I would not recommend this product.