Powerful but simple, very nice. Although I have to say that Particle Candy's demos impressed me more. With that said, I have to give compliments for the documentation, they alone justify the price. Far too many third party libs either skimp on the docs or don't have any at all, even the ones that cost. This package though has a very good set of docs. I know most people don't like to write documentation nut it really is one of the most important parts in a package.