audijam: i have the same conclusion for Vertax BG-11. well built but the feedback from the buttons aren't the same as Canon legit copy and yeah Vertax is of plastic so it does feel different. however....it is still great value for its price.
when does DPreview start to promote knock off products? I can't imagine this!many battery grip in hong kong and china are clones of the original version. They use reverse engineering tool to clone it bit by bit. They are just inferior clones. I agree Nikon and Canon are greedy for the grips. But this can't justify cloning and promoting cloning! There are third party grips that try to have their own design.