*UPDATE 11/13/15* Please note that new PID controllers and FC's have come out. While this tuning video is still relative, just keep in mind that the actual values may differ with today's PID algorithms. But P is still your main, D still dampens, and I is relative change over time.
A narrated blog of my PID tuning approach, now that I've got these new KISS ESCs. I've also upgraded to MN2204 motors (which are silky smooth) and was excited to try out HQ 5040 props for the first time. These KISS ESCs were night and day difference right off the bat. And the performance to squeeze out was amazing.