The adjustments move the chair items about 1/2 inch which is next to nothing. Lumbar support is locked in a low adjustment with only the 1/2 inch adjustment. Height adjustment is the only redeeming grace.
bought this chair as recommended by a colleague and found it very sturdy and comfortable. Its heavy stuff which need to assembly with other person. Can’t do alone as its heavy chair but good quality one. very recommended to buy.
Assembly is straightforward construction appears acceptable but not exceptional. I have only had it for a few weeks so no information on longevity. The mesh material is very rough to the touch which makes it uncomfortable if you have exposed skin (like wearing shorts). The major problem with this chair is it is it fits only a certain body type. At 6'4" the headrest landed solidly into the top of my shoulders at the highest possible setting. I've removed the headrest and the chair works OK as a mid-height chair with the top of the chair resting on the bottom inch of my shoulder blades. The arm rests are also rather narrow and brush my hips as I get in and out (at the maximum width setting). not enough to cause discomfort or difficulty but if I had more heft I would not fit. My wife is the opposite at barely over 5' she could not sit comfortably due to the depth of the seat and the lowest setting. I'm sure there is someone who this chair fits but it is not us.