This chair was great for about two days until my mid lower back began to ache. I think the seat has a bit too much give and allows the pressure to gather at that point. I returned the chair. Kudos to Staples for a smooth return.
I like this chair for the long days I spend in it. It has great support and yet is cool. It's nice for days that I have work outside in the heat get sweaty then have to sit in my office the rest of the day. I left the headrest and arm rests off so they wouldn't get in my work space.