Ashic shows a trick that can make overriding more flexible, specially when stubbing for tests.
Ashic discusses why some data is best passed in via the ViewBag dynamic as opposed to strongly typed viewmodels.
I just published MSMSpec - my latest project. It uses T4 to extend your MSpec test classes so that they can be tested by the MSTest runner. And it comes with NuGet awesomeness. Read all about it here: