I'd recommend this chair mat. It has held up so far even though it's moderate use. The standard ones at the store crack within a few weeks and completely break apart within a year. I had 3 of that type. Very happy with this one. Doesn't even have any permanent indentations from the chair after a couple months. The carpeting is just over 1/2" thick and the mat moves very little. Maybe slid an inch in since I bought it.
I like the mat but there are a couple problems. My chair wheels make dents in the mat and my chair gets stuck in the ruts. I paid more for this mat expecting better quality and mo more of this problem. Another issue is the mat slipping and shifting on the floor. I bought the mat which was advertised for my type of carpet. I did not expect to have this problem.
Item is not very big so works well in smaller work spaces. I purchased two for a horizontal fit. Staples brand was the least expensive option available at time of purchase and the quality is decent (thick). I would recommend.
Again I was very disappointed with my chair mat I ordered it for "medium Pile" which I believed was a match for my carpet. However it scoots around and has to be continually moved away from my furniture. I will try to remember that I obviously have "deep pile" when I can afford to order another one. It would be more helpful to give your customers a better way to get the right "pile' when ordering small medium deep just doesn't work.
Supposed to be heavy enough to use with medium pile carpet. With 1/4 inch berber the indentations were so deep I could hardly move my chair and I only weigh 165. Would not recommend this product for use on carpet of any height.