I'm not using FAR.
KSP version is the latest 1.1.2. And the AA version is the latest as well. Re-downloaded and re-installed today to see if it was a botched installation or something.
Attempted with two different (custom-made) planes. Now attempted with the Aeris 3A and the Osprey, all autopilot modes causes the plane to become very uncontrollable right after take-off with the control sliders flipping out, eventually crashing the plane if I don't deactivate the Master Switch. I can sort of influence my bearings. Holding a pitch button does tend the plane to pitch up or down, but with struggle and jittering.
Decided to upload an Imgur album (with descriptions!) http://imgur.com/a/YJJPS
Edit: Ah, I forgot about the Mouse Director autopilot. Here are some images from testing the Mouse Director with the Osprey stock plane http://imgur.com/a/gAKDl
Hope this helps