Chair mat is too thin to be effective. Leaving chair on the mat overnight resulted in dimples where the chair's wheels were. Might be fine for low pile office-type carpeting but I'm using in home office with household carpet and it just sinks down too much. I cut 2 ply cardboard to same size as mat to place underneath and that seems to help but it's not very attractive.
It did what it was supposed to do however it is thinner than I thought and as a result of that it dimples easily so it does create divots and you have to work to move around. If it were a little thicker that may be corrected
Returned item to the store 2 days later. Was too thin chair made grooves and got stuck. Tried to buy next thickness up same size but was not available in the Patchogue store