This is a great product for hydration, a bit of caffeine, and ease of use. I take this on vacation with me in case the coffee or tea is bad, and it is a great product post-workout. It has a mild taste, like watered down sports drink, but ultimately it is fine.
I put a tab on my water bottle when I'm doing strenuous activities - like HIIT, hiking, cycling, etc to replenish the loss of water and need that extra energy. I feel the energy surge - give you that extra boost.