Chair was relatively easy to assemble. The headrest does not sit perfectly straight on the chairback but it is a small offset and does not affect the functionality. My only complaint is that the ;addle controls under the seat seem to be on the opposite side compared to the drawings in the manual.
Got a new chair for my computer desk as I was having back pain from the straight chair I had been using. This one is so comfortable I probably sit in it way to long!