This mat is perfect to protect tile floors. The chair wheels don't get caught in the grout area between the tiles. It comes rolled up and they give instructions on how to flatten it out. All worked fine.
The mat is very thin. My chair legs sink into it and it makes it hard to roll around. The size of the mat is nice it's large and fits my desk perfect. I would not purchase another one I think the hard plastic ones would of been a better choice.