I put the chair mats on the carpet in my office. They were too soft so the casters of my office chair immediately sank into the plastic and I couldn't roll around. I immediately returned both mats and your friendly cashier gave me a full refund. Sorry they didn't work out.
It does the job. I was pleased that it arrived unrolled and flat. It looks like the several mats I have bought at local office supply stores when I was still able to drive and shop. I do recommend this product.