On the positive side the film looks beautiful. Disney is great at delivering visuals.
Weak - everything else. The main character Mirabel was dull, she didn't have the appeal or voice of a main character, particularly when singing. Early on she sings her big power ballad, but it didn't work. The music reached a crescendo, but the singing stayed flat. In the first song where she introduces the characters, it's in an annoying fast-talky way with a group of little kids shouting over her so it's hard to make out what she's talk-singing about.
The whole soundtrack is weak and lazy. I got to the point of cringing when the music started. Luisa's song was the weirdest, it really didn't fit with the film at all. I think Lin Manuel Miranda needs a creativity break, because his work is getting very samey and uninspired.
The story is weak too. Are the magical powers a good thing or a bad thing, the plot can't really come to a decision on that. It also seemed very small in comparison to other films.
Some of the powers seem borderline useless. Sprouting flowers? Shapeshifting as a type of hiccups? The mother healer who doesn't bother to heal her daughter's eyesight? (Odd decision.) And Luisa is treated very badly as the village dogsbody which I don't recall being addressed. Why did she have to collect someone's escaped donkeys? They were barely moving!
And there's no real villain. The sudden animosity between Mirabel and her vain sister seemed forced. But it couldn't be too bad because sister power is one of Disney's main brands these days.
I feel like Disney started this as a loose interpretation of 100 Years of Solitude then actually read the book and realized how little they could actually use!