Saw it last night. I agree with Cos. I found it to be entertaining but very much lacking in story. I think kids might enjoy it, but it was average fare to me, like most of the kids movies we watched this year. Awesome sound, great visuals, but no story. Yes, it is setting up the new franchise, but usually you want to get people hooked with a big opener and this one fell a bit flat.
I'd call it "Fantastic Beasts and how to cash in on a franchise". The studio probably asked for a new cash cow and this one is slated for a total of 5 movies - not off to a good start IMO.
They had a screening of Moana at the theater we were at - should have gone to watch that maybe.