Although the movies were entertaining, I thought it was a travesty what they did to the story. It was like Peter Jackson took a butcher's knife to a masterpiece of literature. That said, the scene with Gandalf vs. the Balrog was exactly the way it played in my head any time I read the book.
Yes, one of the standouts was the entire omission of the scourging of Bag End
by Sauramon. Entirely cut out and only a snip of his fate of being killed by
Worm tongue not at Isenguard but Bag End. Thats kind of the issue with
reading the book and getting a "Hey - that's not how it goes" while you
are watching.