The fact that Ray Bradbury wrote the screenplay and strolls the streets of the set means complaining about how it doesn't compare to the book (which I've read over and over again for fifty years) is meaningless. Movies can't develop the characters as deeply and richly as a book in our hands and a story in our minds can.
That said, The characters, and how they face their fears, and yes succumb to their desires, is represented well. The cast performs very well. The angst of a 54 Charles Holloway, deciding if he should run with the boys, heart health be damned, is well played. Sometimes the wickedness that comes is what we get when we get what is our hearts desire.