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.
This item was a great buy...just don't leave it rolled up in your car over the weekend when it's 90 degrees! It was very difficult to get it unwound and unwrinkled...had to leave it on the floor in the sun and it finally flattened out and then performed perfectly!