I did the todo application, (see todomvc.com) to check if the concept was expressive and robust enough to do it:
Great. Overall, I'm impressed. This really looks like a practical way to keep the JS mess under the carpet.I think that the model works and the haste compiler works very well too. I don´t know any serious limitation. "wcallback" generates spurious DOM elements and so on, but that can be fixed.