This chair arrived today and it was fairly easy to assemble except it was difficult to wedge the back rest between the seat and bracket to align the holes.  But the DESCRIPTION IS WRONG.  The MAX WEIGHT for this chair is 300 lbs (not 500 lbs - check the assembly instructions PDF to confirm), the arm rests are NOT ADJUSTABLE (the hinge pivots so the mounting holes align but after that it is fixed.)  The CASTERS DO NOT ROLL SMOOTHLY even on luxury vinyl plank flooring (albeit I weight slightly over 300 which is why I bought a chair "rated" for 500) and the foot rest is ok but don't put any significant weight on it as the extension bars are flimsy.  This is OK for the sale price I got it at but not for full price.  I'm still debating whether I want to keep it or send it back.