The box was missing the piece for the back of the cabinet.  I called the company and a real person answered the phone.  I was instructed to send an email with certain information and they would send the piece.  I sent the email and have not heard a word - not even confirmation email.... so fingers crossed.  Wayfair did their job, but this is very frustrating.  It is a very heavy unit, and not inexpensive... but sits in a pile on my floor: useless without this piece.