I cringe when I read the comments I wrote about this book 3 years ago when I first read it, after seeing the movie. Of course I knew nothing about screenwriting then, but still... Now I noticed all the various changes as clearly as daylight, and most importantly, I could even come up with the reasons for them most of the time. The dialogue was shortened to make it snappier, some lines were juggled between Tyler and the voice-over, narrative was changed slightly to cut unnecessary characters and make it more linear, etc. And yes, I still like the movie better than the book.