Great Hall Bathroom Vanity!  Although it has not been installed yet, I believe this will be a very positive upgrade for our hall bath.  The vanity itself is solid and very well made.  Excellent piece!  The marble top is two layers as other reviewers noted.  It is not overtly noticeable, but you will notice it if you look for it.   The square shaped white undermount sink looks very nice.  Glad we purchased!  Wish it came with a sink backsplash.