Assembly was super easy with everything including the hex key provided. The red color is a nice deep red. The assembled chair is 80% comfortable with my issue being the headrest. I think I received a defective headrest because one side bows out way more than the other which forces my head to turn to the right. Part of the reason I got this chair was for the headrest so it's a shame that i can't even use it with the headrest because it's uncomfortable.
So enjoying my new chair I have a back issue and I needed a chair with lots of support lower and upper back. This chair offer me all the support I need. Love my chair and I thank you for making such a great product I definitely will advise family friends and coworkers about this products. Very Very Satisfied customer.