I drink a lot of sugar-based energy drinks, though from time to time I will take a break and pick up the sugar-free variety, or just drink black coffee. I thought I would give Kanguru a go. It is one of the better sugar free drinks out there. I liked that it used natural ingredients and that it was much healthier than the other drinks - by that I mean it is designed to have no sugar, rather than what you'll find in other drinks that simply substitute sugar for sweeteners. 4 stars because the taste gets a bit to get used to, and it's pricier than its competitors. I would buy it again.