I do audio production at home and needed something to help make my chair easy to move. Since this will see relatively light use it fits my needs. Would not recommend for '40hr/week' work.
The mat fits well beneath my desk and allows the computer chair's casters to move smoothly on it. Many studs hold the mat securely in place. It is a good product for the price
Thicker than my old mat. Does move a little but it does the job. The teeth on the back could be a little bigger to dig into thick carpet better. They aren't as sharp and deadly as the older mats but maybe they should be so it holds on the carpet better.