The carpet chair mat is a good product. I would not recommend it for thick carpet as the weight of the chair and individual will sink into the carpet. This results in the chair not moving easily. If you have shallow carpets then this is the mat for you. The mat is great quality and will be great in an office.
First mat bought last year was too thin ffor deeper pile worked ok while new and flexiblie. After aging and becoming brittle after a few months small cracks started then more cracks till it started breaking off in middle of pad where most of the wear occurs. Will check this one from time to time to see if it becomes brittle and cracks during the warranty period.
This Chair mat if obviously used on carpet because of the spiked backing. However unless you have some super hard carpet in your office this chair mat WILL crack and start to fall apart from the chair wheels rolling back and forth. Mine lasted just about 1 year but stated to crack within 4-5 months. Now that large chunks are missing it's finally unusable. My office carpet is the standard tight weaves closed loop kind you would find anywhere. This char mat is designed to fail; too thin & too soft... You have been warned; only with I followed the advice of the other reviewers...