The arm rests are very low when I placed my arms to rest It made me slouch. The lumbar is also too far out. Cant sit straight because it bounces back so no ergonomic structure at all.
This replaced a well used (8-10 hrs/day for 6 years) Staples brand chair that I had come to like so much that I worried I wouldn't find a similarly comfortable (for me) chair but after a week of using it I think this will just as good as the old one. As additional comment I can attest that Staples stands behind their chair warranties. I would recommend and buy again.