I grew up reading and watching the Harry Potter movies so simply being "inside" this magical world is great. The visual effects and the cast in this movie are pretty brilliant too. I felt like this second movie didn't tell us much though, it was action-packed but kind of slow in telling the story. The first movie was so much better! This one was kind of disappointing in the plot... I suppose that's because they have to tell the story in 3 more movies but... kind of sloppy. Also, I just have a hard time with the lack of continuity on some of the well-known characters. J.K Rowling could have just expanded on the universe without being sloppy about details that we all would know like Dumbledore's backstory or McGonagall's age. Fantastic Beasts could have also been a separate movie about Newt and his adventures, more lighthearted even. Then make a separate one on Grindelwald and Dumbledore's story. Mixing Fantastic Beasts with Grindelwald just seemed forced and exploitative, like let's just keep milkin' the cow, mixing everything together, without any regard to what has been told in the past or without it making much sense.
Again.. the cast is BRILLIANT.