I really like the Hyken chair but would prefer it if the seat was adjustable seperate from the back rest. Sometimes when sitting all the way up the seat is a little too far back and would be more comfortable if it could slide forward some.
I'm 5'10" and 185 lbs and this chair was comfortable for about 3 months. Now as soon as I sit down I get burning/numbness in my legs and rear end. I sit for at least 8 hours and the only chair I've found relief with is the Aeron (well worth the money for a 12 year warranty).
This chair is very comfortable. I like the mesh seat so much better than other seats. Over time the foam sponge or whatever material deteriorates making you sit in a depression and your tailbone hitting bottom (no pun intended). With mesh that’s it - nothing else to catch you. The chair was easy to put together. The levers are marked as to what they do when pulled. Mine were switched so if I wanted to raise the chair height the lever that says which one to use would’ve tilted the chair instead. Watch out for that.
This chair is comfortable and adjusts to fit well to whomever is sitting in it. We bought several for our offices. Some folks are not fans of the headrests - but those can be removed. I personally love being able to sit back now and then to rest my head. We will definitely consider purchasing more as our other chairs need replacing.