1. Enables creating prototypes or wireframes to showcase the UI flow, layout of the screen and different state transition of you application.

2. Best part is that same can be used to collect feedback from multiple users in form of feedback file… all visually on the screen. Great.

3. Rapid for demonstrating Idea.

4. Great tool for Architects/Designers/Developer/End user to get the UI flow finalized.

5. You can use either your own had drawn sketch or create the UI using available real controls (Silverlight/WPF). If used real control then same can be used by developers/designers to continue further on the development work on the finalized layout.

6. Many built in sketch style controls, scribbles, sticky notes etc. available to easily and uniformly communicate the idea during prototyping.

7. Other prototyping/modeling tools like Balsamiq are kind of static. They are really good into that. But SkecthFlow is dynamic…bit different. (Flow/State Transition/Animation etc)

8. If planned and user properly, SketchFlow visual assets are reusable for actual development.

9. Only Viewer is also available so that multiple people can view without needing full version of Expression.

10. Killer and looks like future of rapid UI flow prototyping.

11. Another killer feature … Documentation (Export all your design in nice formatted word document). Though many improvements people might expect but you will really like the output.

12. SketchFlow was first shown at MIX 09 in Scott Guthrie’s keynote. You can watch the 16 minute demo here at http://videos.visitmix.com/MIX09/KEY01. (Skip forward to 99 minutes and 20 seconds for the SketchFlow section.)