They changed some things from the original book...
...but it really doesn't matter at all, well, i think so:
-They changed the hour in the clock: according to the book it's always 4:30, but they decided to put 3:30 , i don't know why..
-Ferney is the one who kills Rosario, but according 2 the book he's actually dead when that scene happens.
They put some new scenes that fit properly the story.
It was a great movie with great performances!
oooooh, one thing more: i didn't like too much the "paisa accent" Unax Ugalde tried to make, it was quite hard for him and that's comprehensible 'cause he's not colombian.