I love this energy drink. I have been drinking monsters for about 5 years. I started drinking them after i had my baby. I needed something to keep me awake without drinking a lot of calories. I tried this one and loved it. It has the caffeine i need and the carbonation i love. THe taste is very good and not too sugary. I do not feel a drop afterwards or feel when it wears off. I have tried other energy drinks and other flavors from Monster but this is by far the best one and the most effectiveness. I love that it has zero calories. I also use it before i head to the gym and i can notice a difference on my energy levels. I will usually burn more calories when i drink this before the gym. Its more then likely due to the energy and harder workout. This is the only energy drink i will drink. I never feel jittery after and it makes me feel good without having to feel full or having to drink a lot of calories.