This is one of the very best Godzilla movies ever made. There's a really good human story and every moment that Godzilla is on-screen is great. The post-WWII setting absolutely adds to the desperation of the main characters and the dread of having to once again survive an attacking force, this time in the form of a beast that isn't protecting the Earth or any such nonsense. Godzilla is a force of nature (or science) that doesn't care about anything or anyone.

The only drawbacks of this movie are an irritatingly manipulative moment (tugboats) and a couple of unbelievably coincidental reunions.