A small drawback:
The battery compartment cover from the radio transmitter could be with me difficult to open (advantage: I can be almost 100% sure that the cover will not accidentally :))
It is unclear whether this occurs only sporadically or is a common mistake. This, however, you can not bear in this price category certainly.
More unusual but certainly was not otherwise be realized in the price:
Although the trigger on the radio transmitter has as the camera also has two pressure points (light press -> press AF // -> tripping), however, the second hardly noticeable. While this has no adverse effect on the safe release of the camera, and for me is not particularly relevant, but possibly for other :)
Nevertheless, I forgive 5 stars because of the good functionality and because you can hardly find anything comparable for the money.