Movie vs Book

Whenever a movie comes out and it is based on a book, the usual concensus among the viewers is that the book was better, and in my opinion the case of One Flew Over The Cuckoo's Nest is the same.
There were several differences in the movie and the book. Some of these differences include that in the book, Cheswick dies and in the movie he doesn't. Also in the book McMurphy finds out that he is commited by a lifeguard and in the movie it is by one of the aids. In the movie McMurphy steals a bus to get the patients to go fishing and in the book the doctor drives. Also, in the movie Chief plays basketball and in the book he does not.
Differences alone does not make the book better than the movie but I feel that the movie left out several important scenes that would have made it better. An example of this is McMurphy's return to badness. In the book he returns to harassing Ms. Ratched after Cheswick dies. But in the movie Cheswick doesn't die so part of his reason that he had to fight Ratched is gone. I also thought that the movie didn't portray Ms. Ratched as evilly as I percieved her to be when I read the book. The movie was still a good movie in my opinion but like others say, it was not as good as the book.