I tasted Noni juice while on the island of Raitea in the south pacific-one of the places where it's made. it tastes a bit like fermented aloe vera..kinda nasty!! they (the Tahitians) claim it helps everything from high cholesterol, to high blood pressure, to arthritis to well, every single ailment you can imagine. I was almost giggling to myself while reading this poster they had with all the ailments it cures, outside the noni juice stand.
the tahitians swear by the stuff...but really i don't know of any scientific evidence that supports noni juice as a beneficial health product.