I ordered this cabinet already assembled - we just had to put on the wheels and hardware.  That worked great.  However, I noticed that either the cabinet was not well-constructed or it was put together somewhat sloppily because the edges of the drawers do not align completely with the side of the cabinet.  Rather they are wider by a 16th to an 1/8th of an inch on each side.  As I have it in a corner where this part doesn't really show, I am keeping it; however, this flaw keeps me from giving it  5 stars.  The drawers do open and close easily and it works well in my office.