I have a 4 day old P4P2. It's my 2nd one, so I have some experience with which to compare this one. From the git-go it has been erratic. On my first flight at 65' in the air and 600' from the controller it stopped responding to commands and began ascending and moving away. All indicators on the controller were normal. At about 200' I regained sporadic control and got it back home. I tried flying in a different location and again it did the same thing. On the ground, I found that it was reporting, "Radio Signal Quality = Poor." (I've since learned that that apparently only refers to the video transmission signal.) By manually setting the frequency to 2.4g I was able to get a good radio signal. So, I tried another flight and it had the same erratic behavior. I called DJI and their tech told me to use DJI Assistant 2 to re-calibrate everything. That had no effect and again the drone tried to fly away. On this flight I tried to set a waypoint and it said I had to be at least 31" high. The controller was reporting that I was at 50', which by visual observation seemed correct. Today, I will sync the drone to my other controller and try it. That should tell me whether the controller or the drone is bad. Anyone have any thoughts?