Purchase funnel - Dave Ramsey

This purchase funnel, for Financial Peace University on DaveRamsey.com, was well designed. 

After searching for a class location this page appears. 

Clicking the Register & Purchase button at the middle right takes you to this screen.

A green check mark appears when the field has valid input. 

A red X appears when the field input is invalid. 

Upon clicking a Place Order button, most sites take you to a white screen, sometimes without a message and it causes the user to gasp. 

Here, when the Place Order button was clicked the page remains and a message appears in place of the button, "Processing, please wait..." along with a spin-wheel. 

This was a great transition.

The final screen has messaging that cuts into the banner. This visual design decision is excellent. It disrupts the users banner blindness and cues them to read the information.