These drones come with a lot of flight assistance and it's mostly good. It's great because of the confidence it gives the operator. Save for any issues, it's a joy to fly a DJI product or most drones available today.. The problem with GPS and Compass aided software based flight assistance is that for many, they will never learn to fly a drone "properly", i.e: without it. And this is a problem because as a drone operator, the applicable rules require control at all times, including in case of failure or problem. It's rare of course but those events contribute to the bad perception people have of drones. I spend time training with the simulator and less often, flying in real world. I hate this shortcoming of mine when operating my P4. I must get good at it. Notes: Phantom 4 will use GPS/Glonass and its Vision Positioning System to achieve precision while hovering. In ATTI Mode, GPS and Vision Positioning System will not function to aid the aircraft in terms of hovering or navigation. Phantom 4 can fly up to 44.7mph in Sport Mode while in ATTI Mode it can fly up to 35.8mph.