The movie sucked, I knew not to get my hopes up, but seriously, if you never read the book, you would have had to think the movie sucked even more, the way they cut things out caused so much jump in the story that it didnt even really make much sense.
Things I had major problems with:
1. Harry pulling out his wand on dudley in front of all dudley's friends (wouldnt even be an issue if they would have followed the book)
2. Several characters lines were changed, Bellatrix's line about having to mean the unforgivable curses spoken by Voldemort, Kingsley doing Phineas' line about Dumbledore having style, etc
3. Cutting out the whole St. Mungo's visit
I could keep going if anyone wants, but I know you well probably just tell me to gtfo so you can leghump the pile of shit so more.