assembly was easy. seat is comfortable but too high for me even at its lowest (I'm 5'5"). The same is true for the lumbar support its much too high at its lowest setting and actually causes me back pain.
Listen to the reviews this chair is amazing. I'm about 6'4 and this chair fits amazing. I was so scared that it won't fit and it turned out to be a perfect fit. Anyone taller than me will fit comfortably in this chair. One thing I would complain about is that the headrest makes a loud noise when you move it up and down but it's not a big issue.
This looked like a nice chair but after I sat in it for 3 hours for work my back was hurting. Wish the lumbar support could have been moved up higher. Had to return