Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The only fiber product that really works!

Have been using this product for over 5 years. I just take one heaping teaspoon with water every evening, et voilà! Every morning I start the day off right. When people ask how I stay fit and trim at 52, I answer, with regular exercise and Colon Cleanse. I don't always eat fruits and vegetables as I should, so this source of fiber is important for me. And I always buy it from Amazon because it's priced the best here when buying the double pack.