Just placed it on the carpet last week to replace one that I had for many years... This new one is a good size but it looks like it may not be as thick as I would have hoped. On that note I am concerned how long it will last. Just the weight of the chair and not a very heavy chair has caused dents in the mat...let's see what happens when I sit my chair and use the mat.
When I asked customer service where the chair mats were she said what size. I told her and she said I have one that size right here behind the desk.. I purchased the one she had and flattened it at home for 2 days and put it at my desk. I think I bought the wrong one because it is very hard to roll my chair. I have to get up to move it. But I used it already so I'll deal with it.