These are great well built chairs. I bought two and they are used 6+ hours a day. They are adjustable and fit a range of heights comfortable. The casters run smoothly on carpet. The fabric is durable. I will definitely buy a few more.
We have bought three of these for our office so far for the supervisors and love them. The staff all keep asking if they could get one like it. Great lumbar support and super comfy. We have had the first one for over 3 years now and it still looks and performs good as new.