Multi-coating filters help reduce most surface reflections and allow maximum light transmission according to one of the posts in this thread. I'm using a MC set and highly recommend it since they have the same size, weight, and screw on just like DJI filters. You can also use them on Phantom 4 with its gimbal lock if you decide to upgrade the bird later.
TACO-RC ND filters set (ND4/8/16/32) for DJI Phantom 3
Yes I do have multi-coated ones and I like them. But it's your call on what to buy obviously.Do you have multicoated? Multicoated are about 80€. And if I buy non mulicoted I get for the same money also ND64.
I have not but it's nice to have if you live somewhere that is really sunny like in Arizona maybe.Great. Have you ever needed more than ND32? ND64?