Top handling, top haptics, top look.
The BG is very well made, fits perfectly to the device and there are no communication problems.
With the discreet extra weight affects the camera (in my case Eos 600D) especially when heavier lenses are balanced mounted. It has something in his hand and may well switch between portrait and landscape format.
Good is that the shoulder strap can be attached to a point on BG. So this does not bother right-timer close.
Furthermore, the camera works even if the BG is not turned on.
Well done Canon.
Important considerations before you buy
Do not forget the camera through the BG handle is larger and could fit may no longer be in the possibly existing Camera backpack / bag / or protection.