This is just the right size for working at my small desk but I have only had this a few weeks and already there are large dents in the mat where I apparently sit with the rollers in the same place every time I sit down to work... I have a feeling this won't last very long and am wondering if I should have spent a few more dollars to get a better quality one. It isn't digging into the carpet as much but I just can't see that it will last more than a year. Granted I am not a skinny person but I had expected better and have had better luck with other plastic floor mats.
The carpet pads were rolled up loosely and I did not notice the sticker that said it is intended for use on unpadded carpet. When I got home I left the pads in my garage until the next day and when I attempted to unroll them they had become wrinkled and misshappened by the heat in my garage. After leaving them in the sunlight they were OK and I saw the sticker. Bad choice on my part because my carpet is padded.