During the flight, the power has to be adjusted because of the Quadrocopter otherwise decreases analogous to battery voltage. However, this has virtually no meaning because the amount you usually corrected continuously.
During a flight, the transmitter batteries have passed (I'm not sure whether I have overlooked the flashing of the LED on the remote control and it has warned for some time) after which the Quadrocopter like a stone fell from the sky. Despite several crashes it flies perfectly so far.
Positives:
+ Stable flight
+ Ample engine power
+ So far no defects after several crashes
+ Lighting (can also fly in the dark)
Negatives:
- Remote control is not very accurate (turning without altitude change is almost not at all)
- Battery replacement somewhat expensive
Informative:
* Battery life about 5 minutes (at this size probably not much more feasible)
* Position can not be maintained automatically (no ground camera such as the Parrot AR Drone)
* Height can not be maintained automatically (no distance and / or pressure sensor)
* Quite sensitive to wind, therefore more suitable for indoors
For about EUR 30, - I would buy the drone at any time.
