I liked it a lot. I wasn't expecting much but I ended up enjoying every minute of it. I thought it had delightful and whimsical production design, cool setting, some beautiful creatures, I liked all of the main characters, it was funny, but also was dramatic when it needed to be and I liked the idea of the Obscurus. I had a bit of a girl crush on the blonde sister who falls in love with the baker.
However, though I really liked meeting Newt Scamander, I think we told enough of his story in Fantastical Beasts, and as much as I enjoyed it I think continuing to highlight him as we turn the spotlight to Albus Dumbeldore is kinda forced. So I don't know if I want to see the second one or not.
Its funny because Gellert Grindelwald was one of my favorite characters in the Harry Potter books, and I was pissed when he wasn't given his due in the Deathly Hallows movies because he was key to understanding the young Dumbledore. I tended to prefer the villainous characters in the series or at least the troubled characters so Dumbledore wasn't especially high on my list of favorite characters, until his backstory was revealed, then I started liking him. I was really excited for a movie now focussing on his relationship with Grindelwald, but I'm not sure that I like the direction that they are going in. I think to tell the story right you need to start at the beginning when Dumbeldore was in Godric's Hallow, when his dad went to prison and when he became enamoured with Grindewald, embraced his idealogy and lost Ariana. I haven't seen an indication that they are exploring any of these themes in the teasers I have seen. I don't want to only see Dumbledore once he has become a teacher at Hogwarts and is fighting against evil, because I have seen this already. I want to see something new, the flawed Dumbeldorez and I just don't know if this movie is going to cover enough new territory for me. I will probably wait and rent it on DVD if I see it.