We use these for our home offices. While they are necessary to protect the rug it is also expected that you need to replace every 2 years becuase they do crack over time.
I liked the size of the mat as most of the others available are too large but the quality was poor. There are already indentations from my office chairs's wheels and I've only owned the mat for a week.
The product is fine for I need it for. I just wish it were cheaper. I can't believe a piece of plastic is over $20 and that there other ones there for over $50. That is rediculous.