Alexa Phoenix’s review published on Letterboxd:
This film holds up so well, it's amazing. The animation is wonderful, the story is brilliant, the characters are likeable and engaging, and it perfectly captures the era which it recreates.
One thing I noticed this time around that I didn't when I was young is how the Giant himself has the same kind of technological aesthetic prevalent in sci-fi in the 1950s (like his antenna for instance: rings moving around a shaft), as well as his attacking form somewhat resembling the alien lasers from THE WAR OF THE WORLDS, complete with appropriately-retro sound effects.
I also love how the movie doesn't shy away from the nastier side of the era in question, like the Cold War paranoia and the omnipresent threat of nuclear annihilation. Heck, this movie doesn't sugarcoat anything. The word "die" is repeatedly used, there's an entire scene dedicated towards discussing the nature of death, and Hogarth even bleeds when he hits a tree at one point. I was genuinely shocked to see that in an animated film from this far back, considering how wary a lot of companies were about any kind of violence in animation targeted at kids.
It's details like that that truly make this feel like a "family film": one where all ages can get something out of it, and also where you can appreciate it more as an adult. Heck, I would go so far as to say that it's more mature than most other "adult" animation out there because it tackles its topics in such a deep and meaningful way.
If you haven't seen it, watch it. If you have, watch it again. It's awesome.