The chair took me overall around 20-25 mins to build upon arrival. One thing I would recommend people putting this chair together for the first time would be to attach the back of the chair prior to attaching the arm rest as that will make your installation process much quicker and much easier. I'm 5'10"and everything just feels and fit almost perfectly I have set the lumbar support to the highest setting and for the headrest I have it set to the medium setting. The headrest gets uncomfortable when I set it to the highest level as I can feel the plastic of the headrest hitting my back. Only time will tell how long the mesh holds out but overall I'm satisfied with my purchase.
Not for anyone over 5’8” and only took 48 hours for one of the arms to start wobbling. This will get you by until your able to buy a quality chair but make sure you get the warranty because you WILL need it.