My office chair sank into the soft plastic and couldn’t roll freely. Why it’s marketed as being for “Extra Carpet” is beyond me; I can’t imagine it working on anything but hard floors Returned it the next day and Staples took it back without any hassle.
We checked our purchase on line before going to the store. Sales Associates on the selling floor were helpful and made sure we found our selection even though they were busy cleaning. The cashier at the checkout was very friendly and had us checked out in no time. The rug mat for under our desk chair works as expected.