The plastic floor mat is as advertised. It's working as a plastic mat that sits on top of a carpet and supports my wheeled work chair is supposed to work. Ask me in a few months or years if the mat is still in great shape or if like the last one I bought it had cracked so much that a piece of it in the middle had even broken out. (This mat might be a bit thicker than the last one. It cost a bit more than the last one. I guess you get what you pay for if you're lucky.)
This came without a box which surprised me. Hard to store if you are not going to put it down right away. I find it a little soft. I'm using it on carpet as it says it will work and my carpet is very short. If you sit without rolling around much it tends to give a lot which make it hard to get moving. Overall for the price a good matt so far.