Hi! I have bought one Phantom 3 professional in last October. I am wondering if I shall sell out my P3P and buy in a new P4. I like the new features ''Active Obstacle Avoidance'' and ''Auto Follow'' in P4. However I am not sure if these two features are practically useful and value more money or not? Would you recommend me to sell P3 and get in P4?
Thanks for your advice.
Thanks for your advice.