Chair mat works exactly a designed and is good value for the money. Great for occasional use. Might go up a level if you have a stay at home office. One down side is the very sharp nub profile on the back side to hold it in place on your carpet. Use gloves when handling
Should have read other reviews. Flimsy thin edges refuse to lay flat. Chair casters cause dents hard to move chair. Used for one day and going to take it back.