Landed on this chair after trying several different models in store. This one is perfect for me it provides a lot of tension in the back and keeps me upright. You can adjust that if need be though. The quality is great and the warranty is 7 years! My only gripe as some others have mentioned is the chair sometimes slightly rocks forward when seated. It's not something I notice unless I'm paying attention and it doesn't bother me and I would buy this chair again if I had to but just something to point out if you're OCD like me. I think this has to do with how you place the seat on the base wheel during initial construction. Overall 5/5 and would highly recommend.
I definitely recommend the chair -- very comfortable and versatile. Took about an hour start-to-finish to unpack and assemble for this 73 year old fellow (me) and it honestly was easy!