Chair mat is alright but the wheels tend to get stuck on it when using with carpet. If the back wheels of the chair come off the mat they get stuck and you have to get out of the chair to put it back on the mat. Would not recommend.
Using on a very low pile carpet. One hour after using the mat had permanent indentations in it where the chair was. Very cheaply made. Would not recommend.
Have an oriental overlaying wall-to-wall carpeting (a relic) and desk chair was always sticking. Don’t know why I waited so long to get the chair mat. It really helps greatly and enables chair movement freely.