This trilogy, which really is just one book divided into 6 parts (like acts), is one of the most amazing written works ever produced. Tolkien is a genuine genius in bringing about a story that touches every genre: humor, mystery, action, fantasy, war, sci-fi, romance...it's all in there.
It's beautifully crafted, very consistent, and even has multiple languages, one of which is a complete language created by Tolkien for this story.
Many might think that the beginning of the story is slow, but one must read and take in all the foreshadowing that Tolkien introduces in the first two parts. The beginning is the most powerful and interesting of it all--which is saying a lot.
Last, but not least, for those who think watching the films allow one to experience the story: You're wrong. While the films are rich and very powerful, the different medium does not allow for comparisons. What you will find in the written story is so fulfilling--in different ways. Do not let that deter you from picking up this book and experiencing what many others love to experience time and time again.