Delight your stakeholders by validating features instantly. Iterate, experiment and change as fast as you learn.
Rapidly plan and build your application with Avonni. Ensuring your're building the right product.
Collaborate around a common visual model and validate quickly, early on and stay in the loop.
One of the few times I can say I have found EXACTLY the right tool. I can't say I have felt limited at any point to do anything i needed, it is a very complete mockup too but its complexity does not make it hard to use, it took me about 3 hours to feel comfortable with the menus.
All developers prefer to see what they need to build rather than read about what they need to build. The wireframes that I was able to build using Avonnicreator kick started the process. We ended up delivering a somewhat different UI and functionality than what was drafted in the wireframes, but wireframes did help a lot for a team to get started and to do it fast.