I have had an MB-D10 on my D300 since I got it slightly over 5 years ago. It has only been off of the camera once, and that was when I was cleaning it. I use "fast glass" and the camera feels much more balanced in my hands with the MB-D10 on. The duel controls and ability to use an EN-EL4(a) is gravy (an added benefit). Good Luck and Enjoy your Nikons!