Leighton Trent’s review published on Letterboxd :
There is no mistaking this for Miyazaki's most complex film. Instead of building fantasy off the real word like with most of his films, he builds a whole universe here. This is his most deeply imagined (and felt, in some ways) film and because of that ambition, I feel it kind of struggles (and even misses a little) at times. Still, I was bowled over by what he brings to the table here. Though I think its built-in complexity drags it down at times, it's an impressive work of animation and storytelling. With all that surrounds it, it's easy to see why this is called his best/masterpiece, even if I don't quite think so.