The settings I've been using up until this point were;
Basic Gain: Pitch: 150, Roll 150, Yaw 100, Vertical 120
Attitude Gain: Pitch 70, Roll 70
The problem I found with these settings was under heavy acceleration, the quad would oscillate. The same oscillation would occur with high yaw application and when descending from height. After some forum reading I decided to enable "Remote Adjust" by assigning X1 to the Basic Gains and X2 to the Attitude Gains. The oscillation on descent was apparently due to too low gain on Attitude settings.
By using "Remote Adjust", the gain settings can be changed in-flight and the affects judged immediately. I found increasing the Basic Gains to max the quad would start oscillating even just in a hover. Backing it off a few notches would stabilise the quad and give quite good response to input. Dialling the gains all the way down meant the response was much softer and smoother which meant response to input is slowed somewhat. Without knowing what the actual values were at the time, I settled on gains that seem to be a good mix between control authority and smooth flight. There was still some vibration but I'll work on that.
I think I'll keep the Remote Adjust capability setup on the Quad. Being able to dial back the gain for some slow smooth input for photos and video and then dial it up for some hot-dogging is a great feature. All without having to stop and plug in the laptop.
The gain settings I settled on are;
Basic Gain: Pitch: 104, Roll 104, Yaw 69, Vertical 83
Attitude Gain: Pitch 150, Roll 150