There's some really good world-building in this film. America in the 1920's? Absolutely brilliant what is done with it. It feels like a very organic extension of the Harry Potter universe; like it has always been this way and we are peeking back in time in a fictional universe (and not like a different universe altogether, or just shameless fandom branding).

However the plot leaves a lot to be desired. The "Fantastic Beasts" wrapper doesn't wind up nearly as exciting as the world around it. It's a very basic fetch quest type story that merely serves to introduce new characters and places and things; it also serves to dumb-down and grind the interesting stuff to a halt. The action scenes aren't great -- choppy, bad CGI, mindlessness (though not the mating dance which was a real delight) -- they go on a tad too long and don't add much overall.

Rowling clearly knows what she's doing, yet for some reason resorted to a paint-by-numbers plot to get her points across. Maybe it was studio interference (albeit only for the first film, to re-introduce things in a simple way) or maybe all the good stuff is being saved for later (ugh, world-building).

Sorcerer's Stone used a fairly simple plot to build a world, yet it felt like an organic extension of what we were seeing and how it was being shaped and presented to us. Here it feels cheap, unfinished and of two disparate ideas.