The Chair arrived two days earlier than planned; extremely easy to put together; but FOLLOW the STEP one, STEP two, STEP three, four, five instructions "in that order" ~ and you will be fine.  Simple to put together, works great.  I am still trying to figure out the tilt mechanism.  Love the that the arms raise up allowing you to slide the chair under the desk, out of the way!!   I would buy this again!!!