@kevinpet -- totally understand where you're coming from, and we've received several similar comments today. To date, we've been trying to "mask" a lot of the complexity as well as the numerous variables that go into the model.

However, clearly a number of users want to see more details, along with an explanation of assumptions being made, and the ability to tweak and change these assumptions.

We hope to add these to SmartAsset.com very shortly.