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.
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.
The mat works great over our new carpeting. The chair rolls freely over it no problems. The mat is thick enough that it doesn't move from it position while moving the chair around. I highly recommend it.
I wanted a chair mat for my home office and this one fits that need. However It came rolled up which was hard to maneuver until I actually put my chair on it. There was also the packing slip envelope stuck to it which was hard to remove. It works well but the ends ride up from the chair and can hurt your feet. I probably should have bought a more expensive one.