I have been using Optimum Nutrition Amino Energy for a few months now and I love it. It is a great pre-workout and energy booster that helps me get through my workouts and my day. It has a delicious fruit fusion flavor that mixes well with water and tastes refreshing.I like that it has green tea and green coffee extracts that provide natural caffeine and antioxidants. It also has BCAA and amino acids that support muscle recovery and endurance. It is keto friendly and has zero sugar, which means I can still take when I am intermittent fasting if I need a pick me up in the morning.I usually take two scoops before my workout and I feel energized and focused. It does not make me jittery or crash like some other pre-workouts. It also helps me with my appetite control and hydration. I sometimes take another scoop in the afternoon when I need a pick-me-up.I would highly recommend this product to anyone who is looking for a pre-workout and energy supplement that is natural, effective, and tasty. It is one of the best products I have tried from Optimum Nutrition and I will definitely buy it again.