Been checking on the price of this for a while waiting for it to drop back down to a sale price.
Incredibly well reviewed application that allows you to dive into the archives and techniques of the Disney studios.
I don't know when the deal ends, but figured it may last until the holiday season is done with. Maybe.
Here's a preview of the app on Youtube. https://www.youtube.com/watch?v=MUcyfUN3o1U