Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best Shampoo in the World

This is by far the best shampoo I've ever used. I first used it years ago, but it became unavailable first in salons, then you could't find it in beauty supply stores. It's been years since I've used it. It is so rich, but is gentle enough to use daily and hydrates your hair while it cleans it. It also gives it great body and makes it easy to manage. I'm just so thrilled that I can buy it through Amazon!