I bought this in January 2020. Now in December 2020 I already have to get another chair because this one is defective. It cannot hold its position when I sit on it it sink all the way to the floor. And no it is not because I am a large guy.
So I really wanted to love this chair. I did. And I like it but certainly don't love it. Had I been able to shop in the store and have gotten to sit in the chair I would not have purchased it. The rocking back and forth (right to left) of the seat is annoying. The rigidity of the back: it is either way too loose (to let you lay back way too far) or it requires a 90 degree angle. Neither option is comfortable. Now I can sit on the seat for hours and hours without pain. So the mesh and support of the seat is nice.
Assembling with the included hex key required no more than 30 minutes. Assembly instructions & packaging were perfect. Comfortable chair. Lots of flexibility. Would highly recommend and would re-purchase.