Let me make a first guinea pig report directly to you, here it goes.
I've been testing my P3P with several flights, several conditions, windy, calm, even got caught by a sudden rain, survived. I did fly the max altitude and the distance, returned home manually and with auto RTH. I even tested it in a tiny forest area surrounded by tall trees. RTH worked like a charm, it avoided the trees perfectly. I did fly over water, close to surface several times. I did fly over roofs and obstacles. Did some crazy maneuvers in the middle of the forest and flew right on top the trees for some spectacular footage. Controls do feel perfect and easy to adapt. All the flight modes work like a charm. Camera is very good, no bugs there. Calibrations (if done right) have fixed all the minor issues. Updated firmware twice, no new issues appeared.
I can honestly tell you, my P3P works 100% perfectly for now.
I will keep testing it for you and report later about all the missing stuff I did not yet try out.
ps. I am iOS user, did order early and got my Phantom and app in the same day so that makes me one lucky guinea pig.
Hopefully my little experience with this awesome machine will help you make your decision if you ever are thinking of getting one.