First unpacked and annoyed. In the package is a silicate bags had opened. But something can happen halt. By contrast, no one is immune. So first clean up what's going fast. Then I first admired the battery grip. I see little difference to the original. Sure, it's plastic, but that is impact-resistant, does not not bend and creaks! Below, a metal plate is installed so that keeps the camera also stable on a tripod. SO that is. Direct a battery in and tested. The ON / OFF knob on the trigger is merely a backup of the trigger. But what about when to have a truly On / off function also more better. All keys function and the battery is detected and displayed in the camera. I am very pleased. And that with a price difference of 200 euros silly!