Lovely film. The monsters look and sound amazing, the music is great, the monster fight scenes are long, complex, and more visible than the previous American Godzilla (2014). This really is on par with the Toho movies, and respectful. It takes thousands of people and $200M to accomplish what Ishiro Honda did with $175K ($1.662M after inflation), a few dozen people, and a rubber suit. They have a nice credit memorial to Haruo Nakajima (1929-2017), the original Godzilla actor.
The mythology and backstory for the monsters is a nice touch, the kind of pseudo-scientific gobbledigook Toho does. The literal deus ex machina plot device is annoying, but functional, it drives the plot along.
Naturally, I sympathize entirely with the villains. Their motivation is the only sane response; the evil megacorp (led by the dumbass CEO from Silicon Valley) and military trying to destroy the kaiju are insane and species-suicidal. Ken Watanabe is great, and Zhang Ziyi and Bradley Whitford (who I think of as TV's Frank Jr, but he was on West Wing) are interesting and given good lines. Most of the other Humans I could do without, especially the annoying screaming child and the "hero" who shares my name.
The credits sequence bears rewatching, there's a lot of details there and I couldn't follow all of them; and there's a post-credits sequence, so stick around for that. The next sequel should be interesting.
This is PG-13, but there's nothing above PG in it, and really should have been in a few places; it's obvious scenes were cut or written around to avoid violence and, uh, suggestive monster behavior. So I'm dinging it a half-star for that and the screaming girl who should've been the first one eaten.