Overall I'm very happy with the chair so far (have used for about a week). I was primarily looking for good lumbar support and this chair has. The lumbar support is adjustable and substantial. I'm finding that I like the mesh fabric; I don't have any sagging issues right off the bat (though I imagine it might stretch a bit in a few weeks/months/years). The only thing that wasn't great about the chair was the neck rest. I am 6' and the neck rest falls below my shoulders actually getting in the way. Taller people might want to consider not installing the neck rest. I ended up going to my local hardware store and buying a couple of brackets that allowed me to raise the headrest by a few inches. It is now in the perfect location. The adjustment didn't require any drilling or damage to the chair and cost about $5. I would definitely recommend doing that if you are wary of getting this chair because of the low neck rest.
I already have the same chair in the office and love it. Finally broke down and bought one for my home office as well. Very comfortable and has good back support.
The back support and feel headrest feel a bit off if you’re of above average height but overall good chair. The arm rests are a bit hard but not too bad. Definitely an average chair not too good or too bad.