Summary in one paragraph: If you're in a small percentage of experts in your field, you may have the seemingly "intuitive" ability to make correct decisions based on limited (the author seeks to coin the term "thin slices" of) information.

This "intuition" is the work of your ventromedial prefrontal cortex.

However, if you are not an expert in your field, then the results of your decision-making (based on a "shallow" history of informative experience) are random, at best.

This book will not help you make better decisions. You probably already know that you shouldn't judge a book by it's cover (the Warren Harding effect -- electing a handsome but inneffective U.S. President).

The book starts strong but does not deliver on the promise of helping you improve your decisions.

Contains entertaining anecdotes, well-written.

Gladwell's presentation of snap decision making is riveting. His many anecdotes support his theory that split decisions require minimal information. He asserts that overthinking an issue will produce inferior results. According to Gladwell, experts require less information than rookies. Considering that the subconscious has stored relevant information, this seems reasonable. Although there are some ambiguities in his arguments, this is a great read. I believe that balanced decision making requires logic and gut, and for this process, the best book, in my opinion, is Optimal Thinking: How to Be Your Best Self.