Ok, so I just watched it. It was pretty good, I'd say an 8/10. It had all the classic Yonebayashi tropes:>adapted from a 1960's British young adult book>British countryside setting>preteen girl protagonist with low self esteem in the beginning of the movie>major revelation through flashback about a character towards the end of the movie
I really like the bit in the beginning and the magic seemed inventive. The aesthetics of Endor College remind me of Luna Nova in LWA but reimagined with a heavy dose of shrooms. It was almost spot-on to Ghibli imo. It wasn't quite as well animated (granted, I doubt it had a budget the size of a Ghibli movie) but it was very, very close. There were definitely a few throwbacks to Miyazaki, like the scene of her lying on her back in the grass at the beginning. Almost all the faces were spot-on to the Ghibli art style as well. Very nice.