Lots of fun for affordable money with slight deductions ...

What is this helicopter does not?
Only suitable for the apartment because he's bigger than you think and like to touch but furnishings just starting.
For semi-professionals to professionals unsuitable because they might feel unchallenged.

[Long Description]
(Introduction)
At Christmas I have been given this helicopter. Previously, I had a small 3-channel helicopter apartment and wanted to get out finally.
The differences are identified quickly: infrared vs. Fernbedinung 2.4GHz and 3-channel vs. 4-channel. The latter comes from the side should fly, what I had been sorely missed.

(Technology of the helicopter)
The technique seems mature and leaves you wanting more and more extreme flight maneuvers. The performance is easily sufficient to be within a few seconds more than the house, or the trees. From about. 45-50% of the power take off of the helicopter.
As long as you still had no hard crash, the helicopter has a very quiet flight behavior, which most likely comes through the gyroscope with no wind. For wind later ...
The inclinations of the rotor in forward / backward value left / right direction is performed quickly without delay, allowing a fly direct conversion of commands. If, in the remote control the maximum power for the axes incl. The tail rotor to 100% (default is 90%), allows the helicopter to fly almost twice as "bitchy". He responds really very hectic, especially when it comes to the tail rotor. I would recommend all beginners to keep this option only once at the default values.
What I have not yet found in a description, but this stands out is that the helicopter must have a lateral acceleration sensor. Holding the helicopter is running rotor in one hand and rotate the helicopter along the vertical axis, the helicopter responded immediately with a counter-thrust in the tail rotor. Although this is helpful in the beginning to better control the helicopter, but sometimes when you fly long solid curves, the lateral acceleration sensor mixes a bit too much. He simply takes off a little too much work. I have not found a way to stop this behavior, or to throttle at least. This is a small downside.

(Wind)
This helicopter makes a huge pleasure with no wind. Once also comes only slight wind, it is only busy to keep the helicopter on track. With gusts I would start as a beginner do not even ... That ends in adventures ... But he is still just too easy.
So no wind: SUPER!
Light wind: Well, but not as a beginner.
Moderate wind gusts included: Let the Heli better on the ground.

(Robustness)
Since one can only say: LMAA, holding out what !!!
Ok, at some point is reached the physical limit of plastic, but said limit is still very high. After a few quite hard crash or involuntary landing in trees, I can tell you exactly what was well constructed and what is not.
Was well built definitely the aluminum frame and the boom to the tail of the helicopter.
The hood is so-so. The battery has an effort at a Frontalchrash forward and smashed it.
What is not well done, the two plastic parts at the rear. The A to support the helicopter and the other probably only decoration. Of course there is the purchse, but in vain are not and for those parts go too fast broken.
My recommendation: From the next hardware store and an aluminum sheet with a maximum thickness of one millimeter buy. Record both said parts on the sheet and with a coping saw sawing with metal sheet and attach to the helicopter. (Pictures I have added.)
Even after the third break of the plastic parts, to the cost of aluminum has out again. ;-)
The rotors I got not yet broken, but I'm working on it. ;-)
The only downer is the linkage to the bob. They make it a fragile impression. There I would have liked Alu. Also a minor nuisance!

(Battery)
Battery performance is fine. Depending on your way to fly between seven and ten minutes. The charging time is between two and three hours. As a spare or replacement battery I bought the following: Spare parts MJX F-45 F645, original spare parts MJX F45-022 battery plus screwdriver
A difference between the original battery and this I could not find.

(Camera)
The helicopter has of work from one device to this camera include: Original RC MJX camera C4002 for T640 / F639 / F645 / F629 helicopter NEW and OVP video camera Camera
A detailed description of this camera, I have specially published about this product. Just this: The 25 Euro are worth their money. ;-)

(Remote control)
The remote fits comfortably in the hand, acts in some places, however, processed something cheap. Nevertheless, it works even for a very precise Hinfaller. You can configure the remote control and read the current axis states of Helis well via the display. As sales / beginners in this Heliklasse a good remote control. Above right is the button to start the camera during the flight or stop. You can remote control with both left- than right-configure boost. By default, however, the thrust is on the left. I have found for me the settings that the left lever I have the thrust and lateral inclination and on the right, the forward / backward and the tail rotor had.

(Supplied)
Included are:
-The Helicopter
-The remote control
-Ersatzrotoren For tail and main rotor
-The Battery
-Bedienungsanleitung In "German" and English. Strictly speaking "German" rather "chinese in English in German". Some sets can not understand you, and from the last third of the manual is carried on in English.

(Summary)
A Super helicopters for migrating from 3- to 4-channel. He makes a lot of fun with no wind and you will not stop. Let in light wind and / or gust, stay away.
A strong buy recommendation !!!