what you get is what you never thought you had

from The Free On-line Dictionary of Computing (8 July 2008)

What You Get Is What You Never Thought You Had
WYGIWYNTYH

   <jargon> (WYGIWYNTYH) A jibe at {WYSIWYG} systems that fail in
   their stated aim by rendering documents differently on screen
   and on paper.

   (1999-06-15)