I was very excited about this product due to the quality ingredients and the added benefit of "energy" due to coffee/caffeine. I do really like the taste, but unfortunately, it upsets my stomach, so I won't be buying again. Also, the recommended serving size did not provide me with any type of noticeable energy boost. Doubling the serving, does in fact give me an energy boost, however, it also doubles my stomach discomfort from drinking it. It also isn't cheap. Regular coffee does not affect me in this way. Too bad, as this product looked very promising to me.