Meh. I've seen every Godzilla movie multiple times, and own most of them on Blu Ray. Anyone looking for more depth than a Saturday morning cartoon out of the human stories is always going to be sadly disappointed. There's only 1 that definitely rises above that (the original Japanese film) and maybe one more (SHIN GODZILLA). The rest are all goofy romps about a giant lizard fighting other giant monsters in professional wrestling matches.
KING OF THE MONSTERS is still better than most. As a fan of the franchise, I was incredibly happy with it.