Which ending is better?
I personally thought the way the movie ended was quite boring. It seemed like this movie was trying to copy 2001: A Space Odyssey (I'm not a fan of 2001) with the incredibly slow pacing. The way the book ended in the hospital was scarier and more exciting.
Another gripe I have about the movie is how long the surgery scene took. It only took a couple minutes to read the scene in the book, but it took about 15 minutes to watch it. Does the director really thing that we want to see them take that long to stick a needle in a guy's head?
Overall, this was a pretty good movie. I would have made it better by cutting the running time to 70 minutes and changing the ending to the way the book ended.