Review of 401k optimizer; web based financial planning tool

[Doug Pape]

Does anyone have experience with the online tool called 401k optimizer.  I am trying to build diversification in my financial plan and want to keep my tax advantaged monies in the market as opposed to leveraging into real estate but do not want to use up decision energy that can be used to find my next real estate deal.  Any practical advice or experience is greatly appreciated.  Thank you for your time.