I have been using Hyken chairs for years and my wife wanted a good computer chair she wanted a gaming chair but I said the hyken is much better especially for long sessions. We ordered it and she loves it.
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.