The Idea was to get the simple KISS FC to the next level and due to intensive long-term tests of some pretty good pilots, Flyduino optimized the code to a point where you can get your quad in the air quickly and easily.

Now you just need to choose your Airframe in the GUI and you are able to fly (at least with KISS ESC), otherwise, you can download presets of well-known pilots for given configurations. And of course, you can tweak the PID yourself through the GUI.