On a scale from one to ten, I’d rate it "Meh."
They took a mediocre book and improved it, but there’s only so much they can do. The most important scene in the fucking movie should have had me in tears (I do cry for good death scenes), and instead I had the "Meh" reaction from above. It was funny in places, but honestly?
Your screenplay is only as good as the original work, and it was a crappy book.
I do plan on loudly cheering when the eighth movie comes out, though. When Snivellus dies, I will be letting loose with a "Yes!" in the theatre.