I'm I the only one to have seen this? It's been out for a while. I thought it was good. Maybe 4 stars rather than 5. It is Harry Potter for Adults. You don't need to know anything about Harry Potter to watch it, but it is in the same universe so it would certainly help your full understanding if you did. It is funny, exciting, sad, and full of fantastic special effects and creatures. I thought it was good family entertainment, but the young kids in my cinema seemed to be bored by some parts.
I think that setting it in 1924 and in New York is a clever way to make it separate from Harry Potter, and it works in my opinion. There are contrasts and you get to see the US Congress of Magic, the equivalent of the British Ministry of Magic. Americans call Muggles, No-Majs, and for a twist a No-Maj has a main role in the story. The main character is Newt Scamander played by Eddie Redmayne and he is a collector and sort of ecologist of rare magical beasts. He is writing the book already mentioned and has just been around the world. Other Wizards don't think magical beasts are that important and generally just kill them, but he saves them. He went to Hogwarts but was thought of as a little odd and a loner and was expelled for letting some animal escape. His teacher, Dumbledore, spoke up for him. He is in America to release a creature that he freed from captivity in Africa. And in America there is a scare about the Wizard, Gellert Grindleward. American Wizards are more underground than in Britain, due to the Salem Witch Trials. They are not allowed to marry or to have relations with No-Majs.The other two characters are a disgraced Auror, Tina Goldstein and her sister, Queenie.
Too tell you any more would be spoiling it, but it is a self-contained story without any cliff-hanger at the end, though with many possibilities for the sequels.