I was replacing one that I had for about 4 years (over carpeting). It had cracked because of age and temperature. Once I installed it I realized that it was going to be "too cheap" as it showed the holes (indentures) in the plastic and was difficult to roll the chair after it had been in place and the chair was "sat on".
Sturdy product easy set up. The indentations from the desk chair wheels remain and the chair tends to get stuck in them when attempting to adjust the distance of the chair from the desk.