Video off the first auto tune flight using the 3DR APM on my Skywalker.
What I didn't realise was that the elevator throws were way too high and so I couldn't tune the elevator on this flight.
The results were very good, far better than I had managed by tweaking the PID's manually.
I would highly recommend this feature but make sure that before you start that your throws are good such that you can happily fly it with 100% rates, your model is balanced and it is trimmed by adjusting the linkages NOT sub-trim.