I read it and I watch the trailer and unlike you I don't find the trailer attractive. It reminds me of Harry Potter (but not as good) and a mix of Wednesday same kind of scenario with the pink roommate. I like opera and musicals (Fantom of the Opera is still my favourite and the last one I saw was Moulin Rouge (theatre) but there are also musicals I like on the screen but this one doesn't sound attractive.
Two of my children went and they said: It's okay .. okay is not a recommendation but they went because there was nothing else playing in the cinema at that time.
I just asked the youngest and she says she can not remember one single song which according to her says enough.
We do like fantasy, fairy tales, mysteries, witches and so on. so how come? Most likely I can watch it faster than you but it is not said that I will do something else in between.

Thanks for the review. \

Btw, I am a bit confused about the fact you recommend it.

P.s. I see a link in the text and am not sure what you are showing.