The previous one of these I had lasted 8 years so I got another. So far so good. It still gets indents from chair wheels the key is rotate the wheels from time to time so they aren't always on the same part of the mat. For a 195 lb guy plus a chair it works well.
I purchased the version that was advertised as suitable for plush carpet. When in use the mat has developed dimples where the casters rest which makes it difficult to roll the chair easily. It should probably been thicker.
The mat is okay for the price but I'd prefer to have one a little bigger. Next time perhaps. This mat would work better for me if it was about 55" wide (or so).