To anyone who finds a self-assembled chair uncomfortable, try turning the baseplate (the part screwed to the bottom of the seat) around 180 degrees.  If installed backwards the chair will be very uncomfortable!

I am a tall guy - 6'3" - and I am very happy with this as my office chair. I paired it with an adjustable standing desk but I just raised the desktop a bit higher than a usual desk and the combination is brilliant. My legs and feet can rest at a comfortable angle finally, my posture is better and this chair is now my favourite thing in the office.  Purchased a second one for our front counter which is raised and my co-worker who is half my height and weight also loves it - so it's a win all around!