I tried the floor sample of the Hyken Technical mesh task chair which felt comfy with a good back support easy to adjust the height rolls forward and back with an easy slide. The only draw is that the armrest is permanent and can't be adjusted or folded. But you can remove it if you dont like to use it.
I tend to get quite warm so the vented chair is very comfortable. After sitting for long periods my old chair would hurt my hamstrings. The shape of the staples chair is such that when I leaned back very little pressure is on my hamstrings. Additionally I really like the lumbar back support that is built into the chair. All in all I am very satisfied with this purchase. My only complaint which is largely trivial is that a small decorative piece of plastic on the wheeled chair base fell off because it caught on my shoe.
You get what you pay for. The stylish elements look a bit cheap and plastic because they are. It's a pain to assemble but has great back support design and flexibility to recline with a head rest and has adjustable height incline and lumbar features. Great value and durable functionality but you won't impress anybody but your own bottom-line.