I've been looking at -- Flashpoint Professional Battery Grip: http://www.adorama.com/Als/ProductPage/ICABGE7AP.html#Reviews Zeikos ZE-CBG7D Power Battery Grip: http://www.bhphotovideo.com/c/product/671926-REG/Zeikos_ZE_CBG7D_ZE_CBG7D_Power_Battery_Grip.html Bower XBGCD7 Professional Battery Grip: http://www.bhphotovideo.com/c/product/677283-REG/Bower_XBGCD7_XBGCD7_Professional_Battery_Grip.html ... and of course the official Canon one: http://www.bhphotovideo.com/c/product/652388-REG/Canon_3815B001_BG_E7_Battery_Grip.html I'd like to save a little money by buying a third party one, so I'd only go with the Canon one if people told me it was undoubtedly worth the extra $70. Of the third party ones, the Bower looks the flimsiest and least professional, and it's apparently not a very popular item, so I think I can rule that one out. So I'm basically looking at the Flashpoint and the Zeikos, but will opt instead for the Canon model if neither of these are adequate. The customer reviews for both do suggest that both are on-par with the Canon, however. Anyone here have experience with one or more of these grips?