It has a great quality, as usual with Studio Ghibli. Which is just a different category in itself when talking about Japanese animation.
Hayao Miyazaki has always had a great love for flying machines, and this may be his ultimate expression of it represented in a film. For any lover of airplanes (specially the golden age) this is a must see.
I don't think it's Miyazaki's best film, but it certainly has all the care and attention to detail. And the human part of the film is actually quite touching. Being torn between what you want, and what it is.
There were a couple of references that were a bit beyond my enjoyment. Like, I never understood the reference to the Magic Mountain and that weird character. But besides that, it's a very nice story.
This is a good review of the film, worth reading:
https://www.thewrap.com/oscarwrap-mi...e-controversy/