Customers say these energy drink packets provide a noticeable energy boost without jitters and help curb appetite. Many appreciate the convenient packaging for on-the-go use and find the flavors enjoyable, with orange being frequently mentioned as a favorite. Users report the packets dissolve well in water and make drinking more water easier. However, some customers are disappointed with recent formula changes, noting the new version has a medicinal taste, doesn't dissolve as well, and creates foam. Common complaints include aftertaste issues and stomach upset for some users. Many long-term customers express frustration with frequent stock shortages and formula modifications.