I use NN3 in some interesting places here in New Caledonia and in Vanuatu, like balancing on a rock in the middle of the rapids of a river:
NN makes it easy to set up quickly and easily while balancing on the edge of a rock
But one place I have not been able to make it work is underwater on coral reefs - especially when holding my breath.
I believe these are the first underwater sphere images ever taken -
All the other images were taken using my NN.