Just received my Polar Pro Cinema Series Set today.
I ordered the Vivid Collection, polarized ones, (ND4, ND8 & ND16). Haven't had a chance to fly with them yet.
I did try putting them on and powering up the Mavic. As expected, the Mavic did not report any sort of gimbal error, so that's promising.
I found I had to snap them on in place firmly to get them to stay attached securely. I thought it best to do this with the gimbal clamp in place.
Maybe eventually I'll do it without the clamp once I get the hang of taking them on and off.
One comment about the case-
For my purposes, (I like small and portable with minimal size), I find the case while very nice, way too big.
I noticed the foam holding the lens in the case also has cutouts to allow your finger to get a grip on each lens and extract it,
a nice idea, but for me the cutouts are too small, at least for my big fingers. Of course, it's easily fixable with a razor blade.
However, for me, I'll go with a different, smaller case.
I have some small 2" square lens cases I use for my Phantom ND filters, each case holding one Phantom ND filter.
In trying them out, I found I could easily fit all three Mavic ND filters into the one 2" square case at once. Much smaller and portable.
I'll just make three lens cutouts in a 2" square piece of foam and use that with the case.