Great product and one person with patience can assemble it. Do NOT use power Screw driver!  This is designed for hand tool!  Be patient!  It took 4 hours to assemble by myself, don’t try to hurry!  REALLY study the diagrams, you can mske mistakes but they are easily fixed (side panels). When it says DON’T tighten the screws, DON’T, you need some wiggle room to align the screws with the nuts.  This is a sturdy superbly designed product.  The price is terrific!  I built the drawers first to give me more space to work.  The Wheels, really look at the diagram!  The two sides slide up the wire sides, then you snap the end into the wire.