I chose this mat for the shape. As I shopped for different one I like how this went under the desk to avoid the chair wheels getting caught all the time as you move in and out. I gave it a 3 because it doesn't do as well as I thought with padding under my very low pile carpet. If I didn't have the padding it would be a lot better. It has a 1 year warranty so if if wears prematurely they will replace it. Other mats were rectangle and these are better if you don't put your chair all the way under the desk. There are better one's with a lifetime warranty there but for my purpose it is doing fine.
I have berber carpet on a pad in my home office and this is the product specifically identified for the total thickness of my carpet /pad combo. It does not slide nor has it done any damage to my carpet after 4 months of use however it is so rubbery and soft that the hard castors of my desk chair depress the pad over 3/8" and my chair is essentially "stuck" and I have to forcibly roll it out of the depressions. I am very disappointed especially for the money I spent - I really should have returned it but thought perhaps I was just in a bad mood when I first judged it but now months later I should have trusted my gut - by the way I am very happy right now but still hate this product.
Durable and stronger than I expected. This is used on top of carper but under a small table used by infants. This prevents the carpets from being stained and allows for easier clean up of the floor. It's a little pricey but worth it.
This mat is the perfect size for my needs allowing sufficient space around the chair to move around. The lip fits well under the desk. The surface provides for smoother moving but is not slippery. It is barely noticeable on the hardwood.