Ditech.com 's Owning vs. Renting Calculator

Check out Ditech's online Owning vs Renting Calculator. Here are some problems that I found with the calculator:

• It does not count maintenance costs for a house.
• It counts appreciation of the home, but NOT investment of the monthly savings of renting vs owning. You would earn interest on this amount.
  
• It does NOT allow negative appreciation

A faulty calculator from a mortgage lender. Not a surprise.