It is neat, and usually works pretty well... but occasionally I've run into issues where the dashboard 'freezes' for no apparent reason. Looking at the console revealed a backend service threw a 500 error, and because there was no error handling in the front end, the dashboard appeared to freeze. A little bit frustrating to hit this every so often.
http://weblogs.asp.net/blogs/scottgu/image_thumb_65504243.pn...
http://weblogs.asp.net/blogs/scottgu/image_thumb_7486AB10.pn...