I got the mat to preserve new carpet in my office. Has worked well for the most part - certainly easier to roll on than the carpet. It does indent a bit and get stuck in certain spots like other reviewers have said. All in all it's fine.
This mat is thinner than I expected. I was by no means misled. I only assumed a carpet mat would be of a thicker material. My chair settles down into the carpet on top of the mat making it difficult to move around.