Now That I've Seen It...
How much can one really spoil when it comes to a Godzilla movie? Nonetheless, if you don't want to know anything about the film, don't read this.
The reviews I read for this film seemed evenly split between good and bad, and the bad ones kept stressing how nonsensical the plot was. I went in assuming that would be the case, but left puzzled as to why that was a common complaint. I mean, sure, it's a monster movie, so on some level nothing's going to make sense. Setting off an atomic bomb 20 feet from Godzilla's head should vaporize him, not rejuvenate him, but hey, it's a Godzilla movie. It's about a 350-foot-tall lizard that can breath atomic fire, so clearly all rules of biology and nature are out the window from the get-go, but in terms of the story it all worked.
Godzilla, King of the Monsters feels almost exactly like a Toho Godzilla film, except with believable effects, quality acting, and none of the campy cheeziness. It has all the moments of nonsense one expects-- Godzilla has an underwater castle, for example, decorated with painting of him fighting monsters and statues of spear-wielding Godzillas. Sure, why not? Mothra disintegrates into magic dust to revive an ailing Godzilla? Of course she does. Hell, Rodan did the same once, so it's right out of the Toho playbook.
Enough beating around the bush. The movie is great for what it is. It's by far the best giant monster battle movie ever made. The 2014 Godzilla is a better film, but this is the better kaiju film, if you get the difference. The first fight between Godzilla and King Ghidorah is like nothing I'd ever seen before in my life, and it left me, and the entire audience, it seemed, breathless. The trailers don't do this film justice-- the creatures look utterly real and the battles are breathtaking. They're well-lit, and seen from various points of view at various times in the film.
The film also balances the plot and the battles nicely. You don't get as much monster fighting as you might think, and you really only get glimpses of the monsters who aren't in the trailer, but you get what feels like the perfect amount of fighting.
Lastly, both in this post, and in the film, the final shot before the end credits roll (stay to the very end for a post-credits scene btw) is nothing short of amazing.