Good comfortable chair. I've been using it for 10+ hours at a stretch (thanks coronavirus!) with no discomfort. Great back support. Head rest a little bit low for my taste (I'm 5'10") but that's probably just me. The seat has hard edges that took me a day or so to adjust to probably due to my previous chair having no such edges and allowing me to spread out without thinking.
Impossible to use for anyone even close to 6ft tall or taller. I am 6'2" and it just grinds into my neck and traps all day. I have to slouch a few inches or lean all the way back at an angle for it to work at all on the "tallest" setting. I am very surprised at this design flaw and how it isn't addressed anywhere or mentioned in any way. It's unfortunate because I had already had a bad experienced and Staples customer service did an awesome job. Now to have it all been a waste of time because this has to go back is a fitting way to end this experience I suppose... Don't see any reason why I would consider another Staples product.
Excellent back support in a wonderfully comfortable mesh chair with height adjustment for seat and arms in combination with a good headrest. Recommended for lengthy sessions at any desk or work station.