I currently have an OEM Nikon on my D750 (bought
second hand in new condition) and a Meike on a d7200. There is a noticeable difference between the two but whether you would notice it without having used the two I'm not so sure. The quality on the Nikon is better, the feel of the materials, construction and the security of the screw fixing is better. For the price the Meike is good. I've had to repair the battery tray on the Meike as the spring pinged out of position. It was easy to solve by undoing 3 screws and locating it again. For the outlay the Meike is very good value, the Nikon OEM is very good quality if you are happy paying the extra. The cost of the OEM grips new does seem to be excessive for what they are, if you can find a
second hand one they are better value.