All in all, a very successful product that about 1/3 less cost as the original without that you have to give up anything. You even get 2 more batteries to: o).
Benefits:
- Trigger for vertical shooting
- Double battery capacity
- Extra Magazine for normal batteries (for emergencies)
- Evaluates the camera on
- The camera grip
- The camera is much better in the hand
Disadvantage:
- For people with small hands, the camera is then too powerful
I am very satisfied and can only recommend the BG.