FitNesse is becoming a buzz word in the Agile community. People have seen it used in small examples, but may not think it is appropriate for their project. This session will show how it has been a great success factor in a critical Norwegian banking project at BBS, and how it was valuable to both developers and domain experts. The talk will present technical tips and tricks with code examples for writing reusable and maintainable tests and code. It will take you through the obstacles we met along the way, and how we overcame them.