Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not as exciting as the title led me to believe.

"About 20% of the book is useful to 80% of my life! Seriously it has a good thing going for it, but most of it was the same stuff repeated over and over again in different words. I kept saying out loud while reading the book 'Get to the point!" Guess the book was pretty effective then because I got 80% of the usefulness out of 20% of it."