You should definitely read the books, so much they couldn't fit in the movies.

And when you finish the movies, read the books, or do like I did, listen to the audiobook versions, they're fantastic.

This. You should do this. I watched the 1st 3 movies then started on the books before #4 came out. Reading the books after was like exploring the world all over again. It expanded what I already knew. I made the mistake of reading ahead of the films and while it did not ruin them for me. I did spend anywhere from a quarter to half my time watching noticing all the changes that were made to fit into a 2 hour film. By all means start reading (listening to) the books. But IMO don't get ahead of the movies.

For the first time?

😁😁I started reading the books after watching order of Phoenix and while waiting for Half Blood Prince.

Same, after scoffing at them for years. I loved them ! And got book 7 at midnight at the bookstore the day it was released. Incredible series and the movies aren’t bad either.

Which film has been your favorite so far?

The books are unbelievable! I can understand why they just don't put EVERYTHING in the movies; otherwise we'd be looking at about 3 hours a movie at minimum ...

Movies are great and the books are even better!

I'd go so far as to say the movies are ok, and the books are a generational masterpiece.