I chose to assemble the chair myself. It was easy to do since the manufacturer provided excellent directions and the tools to do so. I am very happy with this comfortable chair.
It is just the right size for my craft table. I didn't install the arms as they would get in the way. Pretty easy to assemble. Comfortable so far hope it stays that way!
I work from home for 13 hours shifts. I needed a basically comfortable chair for my basically comfortable rear. Like me this chair does not come with a lot of factory installed options.