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.
I was replacing a mat that did not have tapered edges. I love the taper on the new mat. However I am still running over sticky tape spots that occurred when it was rolled for delivery but didn't hold. (The mat was leaning against my house standing up and curling at the bottom). My biggest problem is the large about 8 x 11" paper at the lip. I expected to pull it off in one sheet. Instead it comes off in small pieces and leaves thinner paper stuck to the mat. I don't have time to pick at this stuff!!
Floor Mat was delivered within 24 hours which was a plus. Unfortunately it was filthy on both sides and took me 15-20 minutes to clean it and remove the labels from it before I could use it. Overall not a good experience but the floor mat was in new condition once I cleaned it and I am happy with the product.