I have wanted to read this book for such a long time! 
 I have watched the film many times before and it is perhaps one of my favourite films, and then I saw the book in Waterstones and decided that one day I would have that book! And I got it for Christmas this year, and proceeded to read it in a morning. 
 If I had not known that this is meant to be Susanna Kaysen's true memoir, I might have been slightly disappointed, or more than slightly, but because of that fact, I was not. 
 It turns out that she was not so close with Lisa as they depicted in the film, and (view spoiler)[that Susanna also did not actually escape at any time. The whole time she was in the hospital, Susanna actually behaved a lot better than she did in the film. (hide spoiler)] These were a couple of things that almost would have disappointed me. 
 There was less humorous incidents in the book than there was in the film, though there were some that were not in the film, so I guess they balance each other out. 
 On the other hand, there are many other things that you do find out in the book that, in my opinion make the book better than the film, for example the fate of a couple of the characters are shown; (view spoiler)[Lisa was one of the characters that I did enjoy the most, both book and film, and I am glad that she managed to get out. I am also glad that Susanna did not actually see Daisy's dead body, and that nobody said the terrible things they said to Daisy's face. (hide spoiler)]