For energy drinks, they work, but its like NOx on need for speed, just a quick boost. It depends on how fast you drink it too. However, there are plenty of natural alternatives that are better for you. Peanuts, bananas... And as for hydrating, there's nothing more hydrating than water. After all, it is HYDRation, you know, water... lol So, to summarise, it's best to buy monster energy when you want something quick to give you a kick, and eat peanuts and drink water when you ride, it'll work better.