Overall like the chair easy to set up easy to adjust won't be able to say much more without trying it for a long period of time (only used for about 1week so far). Will say that if you're over ~5'10" you will want to probably get a bigger chair (e.g. the similarly designed dexley if shopping at this price-point) or else be willing to go without the headrest. I'm 6'0" and went back and forth between ordering this or the dexley after reading lots of reviews. the consensus online seemed to be that the hyken was for people below 5'10" -- but all those reviews were also by "larger" people I am quite skinny so I was worried the dexley would be too large. In all respects the hyken fits me perfectly except the bottom of the headrest digs into the top of my shoulders and I had to remove it. (Before removing the headrest my wife also tried the chair and quite liked it - including the headrest but she's quite a bit shorter than I am.)
This chair allows me to work from home comfortably for hours. The recline and the headrest are nice features that allow me to take breaks once in a while. The items that prevent it from being a 5 star chair is the lumbar support. The lumbar support can't be adjusted too much so depending on your sitting position it might not be as supportive as it can be.
I haven't found a chair that has a nice combination of features of lumbar headrest and lean support that works with me. The leaning resistance can be high which is good for me because I need my chair to keep me sitting straight since I lean a lot. The mesh is a nice touch to keep the air flow not sticky like other chairs. Can recommend to just about anyone who wants a chair for productivity and relaxing.