I bought this mat to replace one about 10 years old that had cracked and in which holes had formed. The new mat is much thinner than the old one so thin in fact that I put the cardboard that it came in between the old mat and the new one. I seriously doubt it will last 6 months. Next time I'll spend the money and get one that's more substantial and sturdy.
My "office" chair would bog down on the carpet. I do a great deal of my day getting up & down and because the chair was hard to move it made it agravating. NOW with the MAT my chair slides like a hockey-puck on ice.