Got pros: When flying outside the city (towers of electric wires, cellular communications, Wi-Fi, etc.), it behaves very cool. I didn’t send it for kilometers, but sent it to the sea for three hundred meters (altitude 70-100m), the signal is excellent. A lot of video lessons, firmware and application ates, I quickly got used to the controls. Flying on the coast, I sent it from the takeoff point to 300-500m and to a height of 70m, the copter steadfastly withstood the wind at a height (the remote control asked to return or change the height, but control was not lost). No registration required (249gr). Has cons: With the firmware for the RF (2.4Hz) in the city, there is a problem with connecting the remote control and the copter, when climbing to a height of about 30 meters, it shows that the connection with the remote control is lost, but it returns to the home point). So far I haven't been able to resolve this issue.