I have purchased quite a few of these chair mats. They do the job but I am disappointed that they have to be replaced every 2 years. They crack and begin to deteriorate after 12-18 months of use and need to be replaced every 24 months or so.
Can hardly support any weight. Chair casters get stuck in one position because the mat warps. I highly recommend a chair mat with at least 0.08" thickness to support a chair.