I decided to save some money when buying a battery grip for the Nikon D750 and bought an off-brand.

On eBay, I found a High-Quality Multi-Power Battery Grip Holder Pack For Nikon D750 Vertical Camera for $78 and $10 for shipping from overseas. Here is the LINK

It comes with two types of battery holders. It works with six AA batteries or EN-EL15.

The grip fits perfectly onto the Nikon D750, and everything works great.

There is a second set of buttons and dials on the back.

The Sub-Menu dial is on the front, just like the camera and shutter release. Lightweight, and I like it because I prefer the vertical grip when shooting verticals and adding a little more balance for the lenses.

Everything works excellently; that is all the pros I can think of right now.

Cons–Even after turning off the camera and the grip, the battery will drain just sitting around in the hold.

The Nikon MB-16 is still available for pre-order. Here is that LINK. The price is $369. So if you are bothered by the battery draining, save money and buy the Nikon MB-16.