Quality and price probably the best alternative to the original!
In addition to the many helpful reviews here, even its own experience
(Like I have read in various forums):
As the set screw of BG up and down a few millimeters game has,
the camera must be placed very carefully (without pressure on the set screw).
==> Only then folds the solid and secure connection of BG to the camera.
However, if the camera is pressed with pressure on the set screw, then left after
Tightening a gap of about 1-2 mm and everything shakes and keeps nothing !!!
Bought the BG was directly from my photo / Berlin.
Great service & super fast - I'm very happy - thank you !!!
The batteries I will contact you again later.