Although I'm only 5'7", & have relatively small hands for a guy, I found that this grip IMPROVED the comfort of holding the 5DII, and the added mass really seems to help in holding the camera steady. I was originally concerned about the weight, & thought I would load just one battery, but find that I love the solid & stable feel I get with both batteries in place. And it is definitely more stable for vertical shots. Now that I've used it, I never want to be without it.