When I unpacked the eye Heli, I thought at first that he looked quite diffizil. However, he has survived all crashes without any major damage to date.
The first flight tests were very awkward, since this is my first heli. After about four or five battery charge, I had him then relatively under control.
Now, after about two weeks, it makes crazy fun to Heli through the house to let fly.
The only flaws that I have, that he lift the always drifts to the left (which is probably due to the strong wind the tail rotor). He also can not be controlled very accuratly, as he always loses when maneuvering at height and you have the balance by increasing the thrust. If you want then let him stand in the air calm again, it pulls the helicopter always high at the ceiling.
You have to correct the height so constantly.
If you, however, that practiced a couple of times, it's simple to compensate.
I for one do not bereuhe my purchase, because you can do absolutely nothing wrong with the price.