I was looking for a firmer thicker mat for under the desk chair opted for this one. It's okay. I can wheel around generally but it does seem sort of "giving". I find my chair winds up with wheels holed into little "divots" where the mat deflects making it harder to apply some lateral force and roll out of them and laterally along the mat once again. Well okay so I'll use it until it break up then try another one....
This mat is only 1/8' thick and dimples easily by the chair casters. I've only used it for about 3 weeks but I predict that it won't last very long. If you're going to invest in a chair mat get one that's at least 1/4" thick.
I bought it because I needed such an item. This one was reasonably priced. As it turns out it is too thin too soft and sometimes the five wheels on my chair make soft impressions in the chair mat.