It is too flexible. Wheels of chair sink into it and the chair does not move smoothly over the surface. Chair will not roll well at all. Mats I have had in the past were hard plastic and the chair wheels could move smoothly without sinking into the mat.
It works OK but is a little thin. The only problem I have with it is that the wheels of the chair carve indentations into it something you notice each time I move the chair. They do go away after while.