It was very easy to assemble!  The drawers are already assembled and attached to half the desk.  Note the desk top is a splice top.  It comes it two pieces, and is connected with two brackets.  The drawers glide nicely.  The base is heavy duty and comes with casters that can be used or not.   
It also comes with a desk organizer set and a cable tray which attaches to the bottom of the desk. The packaging was excelent!  It came in a sturdy  foam with a slot for every piece.  The edges and corners were protected very well.  It would be very difficult to damage in shipping.  I only gave it four stars due to the table top being spliced.  I would have preferred if it was one piece.