I had to replace the pad about every year They just don't hold up . The should be a little stiffer than what they are so they would last longer than 9 or10 months.
Scuffs easily and the rollers from the chairs leave dents and ruts. Also we have had them about a week and all 4 of the mats hasn't totally laid flat yet. Will not purchase this brand and style again.
Works ok. Not as hard/stiff as I hoped. Starts out flat. Chair casters make a depression when I'm seated for a while. Thus the chair does then not roll easily to a new position.