I placed it on the floor and it seemed to be perfect except that it really smelled badly - a toxic smell. I placed it outside for a few days and it curled up into 5 angled object. Some of the smell is gone but it's still kinked. One is in use and the other is still unwinding.
Bought to use over plush carpet for home office. I only weigh about 135 lbs. but my chair sinks into the mat making it very difficult to move the chair. I think if this product were thicker or made of stiffer material the chair would glide easier. Perhaps it would work better over commercial grade carpet without a pad. Overall not very happy with this product.