The short form: we liked the film. I'm less of an authority on Potteriana than Gretchen is, so I'll miss details that got dropped out without it bothering me, but it pretty much didn't bother her either.
The funniest part of the movie, though...
was after the final credits rolled and J.K. Rowling appeared on the screen, saying "Go home!"
I didn't realize that she was a Muppet fan!