If you're someone who wants to understand why we should eat a certain way, you'll like that Weil provides fairly involved scientific explanations for his nutritional advice (for a book aimed at a lay audience). There's a lot of detail in this book, and a lot of interesting facts to mull over.

On the other hand, I wish Weil had addressed some of the more hotly contested nutritional issues - how much protein should we eat? is dairy good for us? what's the deal with raw milk? - in more depth. The parts of the book that addressed the health repercussions of alternative (e.g. vegan and raw food) diets were the most interesting to me. Unfortunately, these made up just a page here and there.

Finally, at almost 10 years old, the book could really do with an update.

Overall I'd say if you're just starting to take an interest in nutrition, and you like reading about the science of everyday life, this book would be a good first foray into the subject of nutrition and health.