It was fairly easy to assemble except for the wheels that I couldnt solve but my roommate did it for me. It's very comfortable I only feel a little discomfort after like 7 hours sitting on it. I didn't install the head support and I think it looks better without it.
Very nice chair and comfortable. The only thing I did not like are the casters. I bought some that are more like inline skates and this made the chair perfect.