The Phantom 3S is absolutely phenomenal when used with Litchi flight plans created on the Litchi Mission Hub. I just ran a mission out over tropical rain forest, that was 18 minutes in duration, yet the drone returned with a whopping 47% battery capacity.
The footage was spectacular, thanks to Litchi's POI camera settings, and now I am seriously contemplating a 20 minute flight. To think these P3S drones are now going for a piddling $150 on ebay, I don't see any reason to buy anything newer or costlier. With my lowly P3S, I'm in hawg heaven.