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.
The grip pegs on the bottom are not long enough for the thickness of the carpet under it. I bought it because it was the only one available with an under-the-desk tab which fit the opening I have. It will probably crack with age but it was cheap enough if it lasts several years.