I'm always careful and critical of third-party products, especially in terms what accessories for my DSLR, have in this regard already had a bad experience, for example in the old 50d with a battery grip, which was indeed well equipped (AA-cell sled, IR remote control, etc.), but in which the contacts are not plants 100% and thus sometimes failures of the camera passed that interferes in the professional and professional use. This then leads to that one painful buys the much more expensive original version of Canon.
The Meike Battery Grip for 6d I have yet again want to take a chance, because the recession here sounded quite passable, he, unlike the original handle only 1/4 costs and was immediately available, return is indeed still.
I am pleasantly surprised: he is clean on the unit, contact problems, there appears to exist no, the material quality and workmanship is neat: you can speak here like 150, - Euro and save this dear stuck in other accessories.