makes it nice, doesn't it!
You will find the the grip actually moves a tiny bit when attached to your camera. Not much.. just enough to be annoying if you are as anal as I am. One fix I found is a small rubber O-ring from Home depot, etc... just big enough to fit around the placement pin on the grip. It kills nearly all movement. (funny, the things that bug different people, huh?) When I am carrying the camera and using it a lot, with the 70-200 TANK lens attached and a SB-900 on top, or on a bracket... the movement just made me feel insecure, so I fixed it!