While it all worked out in the end, one should not receive a cabinet with the sink hole off 1/2 inch from center.  It caused some plumbing difficulties.  I found it difficult to figure out what to do with the gap of about 1/3 of an inch between the cabinet and the back wall.  I ended up making a backsplash of mosaic tile and adhering it to the wall just above counter height.  Then the cabinet top slide right under and could be caulked to create a sealed joint.