From a business point-of-view, our prototyping tool helps us to evaluate and validate all design ideas early in the project. It enables us to generate prototypes based on our wireframes and templates in a faster way.
It allows for setting up multiple scenarios, which give a better insight in the functioning of the end result than just one static prototype. From a user perspective, all feedback on the user experience is given when most crucial. The user experience can be simulated and tested more realistically, even before the development process starts. And from a technical perspective, it facilitates feasibility checks drastically.
In short, changes, from all perspectives, are far less costly at this stage than later in the project. And that is a bonus for everyone.