My APM2 quad flies very well. My gimbal control works well also, and with the advanced settings have calibrated it to stabilize my gopro OK. But the movement is slower than other FC's I've used, more noticeably around the center position. It acts as if there is a "D" value slowing it down in the center.
Is anyone else using a gimbal and doing well? Maybe it is my setup. I have abandoned my NAZA in favor of the APM2, but the NAZA was very quick in gimbal control.