The film was very much like the book - which I thought was really good. But some of the scenes were a little different, like some of the lessons were different.
For example there was a scene at the end of the book with Snape's potion quiz, but they didn't show it in the film.
I think my favourite thing about the film was the three headed dog - it was really vicious but it was called Fluffy. He was only a little bit scary!
Could have been scarier
I was a bit disappointed at the ending. When I read the book the last bit was really scary but in the film it wasn't as scary as you expected it to be - it could have been scarier.