I have no idea how it managed to flight some people here. For me it's enough just to take off, and then on the other hand fly somewhere. I have lots of battery charges been trying to trim the copter, unfortunately without success. Once I had to change a rotor, to make it not even lift without tipping.
Addendum: I was kindly pointed out that one should respect the letter code at the rotors. My mistake! Now he raises at least again. Still, I can not make it into a real flight.