Mat started cracking about 2 months after we got it. Staples wouldn't exchange it because i lost my receipt. So now it just cracks and pops whenever I roll on it.
Had to take mat and place it outdoors for over a week before taking it into the office for use. The odor from the plastic was severe which initially permeated the office with the odor.
My rolling office chair moves effortlessly over this well-constructed sturdy chairpad and my Oriental rug underneath isn't obscured at all. You can hardly see the protective pad. Looks and works great.