Purchased for my husband who has lower back pain. He can adjust this chair so he can sit in it for 60 - 90 minutes without increasing his pain. I put the chair together by myself - not easy for a senior citizen. The hardest task was pushing the casters into the base. We had 3 office chairs in our house. This is by far the most comfortable.
The multiple adjustments are much appreciated and only make me wish for one more. (Or maybe just better instructions.) It would be nice if I could adjust the tilt of the seat bottom. Presently I keep sliding downhill i.e. forward.
I purchased three chairs one for myself and one for each of my kids' computer desks. I have used my chair for 11 months now and while it still looks to be in good shape and nothing has broken I have to give it low marks because the seat cushion no longer provides any support. I use my chair for about 8 hours per day 5 days per week and on average 2 weeks per month. The other weeks I travel so it gets about 50% use. My kids use their chairs only about an hour per day on average. With heavy office use my cushion has flattened to the point it no longer provides any support which has resulted in lower back pain. The chairs that are used less frequently still provide adequate support for a short duration. The chair is rated for up to 5 hours of use but I suspect that even at that level the cushion will compress within a year. I would not recommend this chair for that reason and suggest spending more money to get a higher quality seat.