First order, one of the chairs was missing the entire track system but Wayfair quickly replaced it- BUT when they did they sent me a new chair with a cushion that didn't match my other one- so now I have to look at two chairs side by side with two different color cushions- it drives me nuts. And the new track system chair only has one option, up or down- since the track was put on incorrectly. So just check your purchase as soon as it's delivered- we had to wait a bit until construction was done so by the time we set it all up I was already exhausted from that to complain again. It serves the purpose and I can tolerate it until it's time to buy new cushions and fix the tracks myself.