After only a few days of use the mat is already dented by the wheels of the chair. I am 230 lb but my wife who uses a separate mat is much less and both mats are dented by the chairs.
My experience started with Staples' website to check out size options. Next I went to the Staples near me to make a purchase. A store employee noticed my struggling w/the floor mat. He pointed out my choice helped me by bringing it to the register and even got me a cart to help me get it to the lot. The floor mat is exactly what I needed and the overall experience was a 10/10.
The new chairmat works much better than the old thin one that sagged and made it hard to move the chair. With the new thicker mat I can roll wherever I need to go in my L shaped work desk area.