I am disappointed with DJI and the p4 - they contacted me to say, "Android users need to update software on tablet, plane and controller to solve RTH issue" then say that they will not make any more p4s and are terminating it's support!
My brother and a nephew accompany me flying and were thinking of getting a p3 and p4 respectively. All 3 of us have enjoyed ourselves for a few months but we will now be looking into the drones from more responsible manufacturers.
I haven't had a crash or a RTH incident, I didn't expect either. What I do expect though is satisfactory customer service