When I reviewed the Phantom 4, I was so blown away by how big of an improvement it was over the Phantom 3 Professional, and how much further ahead of the game DJI was versus everyone else making drones, that I awarded it a 5-star rating. That's not something I do often.
Long-distance control; Return-to-home; Forward and rear obstacle detection; Automated flight modes; High-performance Sport mode; 24mm lens; Subject recognition and tracking; 60fps 4K video; 20MP Raw and JPG images; 1-inch sensor camera
Pricey; Side sensors limited in functionality; Must supply smartphone or tablet for camera control