It's not worth the money you pay the chair makes an impression in the mat while working @ computer you are stuck under this dip when you are not sitting it goes back to normal however I guess it protects rug not happy with this product at all!
After I got the mat to lie down on the floor - it has been very good. Might have liked a direction to put the mat out somewhere to "unroll" before I tried to put it under my desk. Getting it in place at the beginning was a real challenge. Also like that the edge is very low so my foot does not catch the edge.
This was the least expensive chair mat and also the only good size for my desk area. It works fine but almost immediately the weight of the occupied chair created dents in the plastic which the chair rolls into. A minor annoyance and much less inconvenient than using an office chair on carpeting or spending more money. Overall good value for the money.