i am 5'7" tall. I never had backpain. after using this chair for couple of days I started having backpain and headache. the lumber support is pinching all the time. There is no way to remove lumber support plastic thingi.
I had the older version of this chair and it was great. Problem started when the gas lift would not stay up and eventually it broke. Bought the new one and it seems slightly better then the old one. Better fitment overall.