My understanding of the aircraft is that the sensor is a bigger than the one used in the iPhone 7. The extra space is used to do some electronic stabilization. There is also a 2 axis gimbal on the camera that is used for mechanical stabilization.
The times I have been flying it has been a little windy but nothing outrageous. I find it pretty stable. What I think happens is that the more the aircraft fights the wind the less time there is to fly because the aircraft is attempting to keep itself stable.
I really really like this little drone. it is so portable and fun to fly. The trade off from 4k and price to size and ease of flight is worth it for my needs. I think the better I get at flying I might have a need for a bigger quad, but for now this is plenty of aircraft for me to handle.
Sidd
"Life moves pretty fast. If you don't stop and look around once in a while, you could miss it." ..... Ferris Bueller