TestAPI for Win32 and .NET applications

I heard about this today and it looks promising... http://testapi.codeplex.com/

According to the site :

"TestApi is a library of test and utility APIs that enables developers and testers to create testing tools and automated tests for .NET and Win32 applications. TestApi provides a set of common test building blocks -- types, data-structures and algorithms -- in a simple, layered, componentized and documented stack."

Post a comment if you have any experience with this.