I read the novel when I was in college on a flight home. Loved the book. The movie was quite good, it didn’t really go into all the strategies the book describes, but you get the idea. There were some visual problems with some of the sets I found distracting. There is also a scene Harrison Ford has a giant crumb of something on his chin, highly distracting. Other than that, solid performances all around.
If you read the book and enjoyed it, you should see it in theaters. If you haven’t read the book, its still a solid rental for sci-fi lovers.