Bluffing but also uncontrollable ...

Here is a small device that has the merit to bluff ages whether at home or in our entourage. After several days of testing, and especially familiarization for guidance controlled drone we ventured on the beach for more space. But also to view videos and therefore we hoped beautiful. In short the first flight for an appetizer with a short video and then a second and there, disaster! The drone is going crazy, my spouse asks for a "return to origin" (I said it then at least 30m drone) but it does not respond, hand in one direction and then the other, takes height and takes off to literally and figuratively!
The rest is simple: lost connection and a drone into the sea! You can imagine our heads! Of course not retrieve it, it was too far, and the water too cold at that!
Too bad because this small device had it all:
Light, stable flight, I expected it to be much noisier, discreet because of its size ...
For the price you expect something powerful but especially viable.