The chair is not superior (for sure not comparable to those 600+ ones in terms of build quality and adjustability) but fairly good for its price. Do note that the adjustable lumbar support can only be moved up/down (without tilting the chair) and you cannot actually make it more/less protruding (like what you can do with some car seats)
In June 2020 I had extensive spinal surgery. No chair in my household offered comfortable seating longer than 15-20 minutes. This office chair has allowed me to sit comfortably to correct graduate level papers. I take a "break" every 30 minutes and return to this chair to continue my work. It works for me allowing me to do my work!