Meh. Definitely not my favourite. I found it much more boring than the other books of the series. Also a few things annoyed me way too much to make this enjoyable. Yes, of course I know how these books work: The poor, poor, only poor Baudelaire children on one side, and the evil, evil, only evil (well, sometimes only ignorant) world on the other side, and that's cool and what makes this stuff fun to read. But well... choose your evil characters wisely. If there's only one person with ambiguous gender presentation in your story, and you make that uncertainty their defining aspect and refer to it all the fucking time, and that one person is not only evil, but also referred to as "the creature" half of the time and as "this despicable creature" once, you're being a major asshole.
Also kind of pissed off by the role of Aunt Josephine who is afraid of everything, but yeah, I can find excuses for that inside the story. It just added to the general feeling of "nope" and disappointment I felt for this chapter of the Baudelaire orphans' tragic, tragic lifes.