Crutchfield Customer Review (What's this?)
For several weeks I have been using the first part that extends the grip and adds an additional shutter button and sub dial. I use these all the time instead of the one on the camera. I think it makes the camera much more convenient and secure to hold. The grip has to be removed to change the battery, a mild inconvenience that takes only a few seconds, just spin the lock wheel and that's it. I will continue to use it full time going forward. Haven't had much need yet to use the 2nd part that holds a second battery and adds several Fn buttons, additional shutter button for vertical shooting plus an additional main dial. Having both attached increases the height considerably.
Pros: Works great. Makes the camera easier to hold, better feel.
Cons: Great addition other than the price is more than it should be. Price is only reason I did not give it 5 stars. 1/3rd the price of a replacement body is too much.