Hmmm, thought I posted on this thread but it must be a different one about acai. I've posted that I like the acai "smoothies" I used to buy at my local grocery (they stopped selling this brand so I stopped drinking acai as every product that has it in there is pricey). I felt the juice drinks were "energizing," tasted good and filled me up and there was nothing that I disliked about the ingredients. I loved the chocolate-fruit taste that I assume came from the acai, which has a chocolate undertone to it.
That said I had wanted to clarify wherever I posted before that I do not think there is any magic weight loss property to acai. It's just a nice berry from South America, tastes good, antioxidant.
I do not think "cleansing" in the human body is a reasonable idea, personally, just my opinion.