It is just okay I can move my chair back and forth easier but I wish they would make one that is a little stiffer so that my chair rollers would not make sinks enough that it I hard to move the chair while sitting in it. If I were much heavier I could see that it might ;sink' in but I weigh 137 lbs and I would like to have one that would stay flat.....or at least flatter!!
We decided not to use it. It was so flimsy that if you set on it on one side the other side would life up. It wouldn't lay down. My mother tripped on it twice and we got rid of it.