This is the one to get if you have a high-pile thick carpet. Standing up great - you could rollerblade on it. Unfortunately the first mat delivered had a 3-inch tear in it at the corner. Not sure whether this is from delivery or from the original product as I was not present when it was delivered. It is quite heavy but holding up well to everyday use.
I liked the mat but it seemed to be for a lower pile carpet than a medium pile carpet. This makes it bow a bit from the weight of a chair and buckle. I would say this is for a low pile carpet.