SmartAsset, the Financial Calculator Killer

My preference has been http://www.nytimes.com/interactive/business/buy-rent-calcula...

There are a lot more options that I can take into account using the NYT version (ownership costs, HOA fees, specific mortgage rate, length of mortgage, rate of return of other investments, etc). How is this calculator better? Just because it’s simpler?

I wrote a very simple/basic calculator when I was shopping around for a home. FWIW, here it is: http://krishna2.com/test/fastloancalc.fcgi?term=30&rate=...