This chair is EXTREMELY difficult to assemble. Instructions don't work and holes don't line up! After 4 hours and two grown men forcing the arms to line up, it was FINALLY assembled. If you get that far, it is comfortable and very usable!
It was mostly easy to put together until the arms. One arm went on very easily. The other arm...holes didn't match up. Had to drill to get the nut into the hole.
I am pretty technical but struggled getting to various pieces to go together. Eventually I had to drill the rear arm rest holes a bit larger to allow the bolt to go through and align with the threaded hole. Once I did that, the chair assembly was possible. Once assembled, it appears like a pretty nice office chair.