I own the BG now for a few weeks and have also the predecessor model at the previous camera 5D Mk II & with this I was always satisfied .. But the new BG has clearly improved .. Ds handling is better in my opinion by some pronounced what I would call handle Multe .. FINALLY (are in my 40D this plastic mounts times broken) no more plastic in the interior as its predecessor the plastic holders of battery .. The 'rail system "to take out the batteries I find awesome .. Even Super is what I mean now for batteries Both can utilize cams .. The BG is stable, grippy & just feels super to .. Granted with the controller I'm still bissl at loggerheads because my brain just does not want to change .. If you work with both models, it is anyway always bissl stupid from old to new .. The Mk III is not yet in flesh & blood passed .. But that is still ..;) Only the price .. Phew is really hard .. But I can without BG & the strap simply no longer photograph. With this combination you have too many choices .. But who comes without strap & without BG deal, the money should one probably invest .. but in something else If you're running around all day with 70-200 and BG of a & & b G with 24-70 on the other cam that is very debilitating .. But for me just an enormously better photograph .. Hope I could one or other of the help .. :)