Since the C++ classes have been designed with scriptability and declarative usage in mind, the bindings already seem to work pretty well. There's an example, AnimatedBox, showing basic usage of the APIs (gotta love that InOutElastic easing curve!).
While I'm here, I'd like to mention a nice little property that we added to QStateMachine: animationsEnabled. Set this property to false, and all animations for property changes will be disabled, i.e. all properties will be set immediately on state transitions. Useful for debugging (no animations that get in the way of the app logic), and when you get tired of all the bling.