Our chair map was dirty and also had a scratch on the underside when we picked it up. The sales person blamed it on the delivery service. I took it anyway because the price was good and it was a "chair mat." My husband didn't agree with me.
Good size perfect thickness for the thin carpet squares in our office. We don't have room for very large mats so these are working perfectly to protect our new carpet and make it easier to move around! Chairs roll smoothly no indentations left on the mat when sitting in one spot for any length of time. Would recommend these to others!
I got the floor mat that was meant for use on a deep pile carpet; even though my carpet is not that thick. This one is super strong and lets my desk (wheeled) chair move very smoothly and should last even longer than the old one. (2 yrs). I had to use a small saber saw to trim off a 12" piece on the end so it would fit in my narrow office space. No problems.
I recently purchased a large desk with a separation and two openings for chairs. It sits on a 3/8" pile carpet. I bought one of these chair mats first liked it so I then purchased another identical one. I bought them on sale so it was a good value. So far they seem to be holding up well quality and thickness are adequate so I'm satisfied.