I mix stevia with unsweetened cranberry juice. It's been a healthy combination for me so far.
Stevia is excellent and it's a true shame that the FDA refuses to let it be used as a manufacturing food additive in order to protect the aspartame/saccharin companies. It's been used for centuries in Latin America and is approved for use in Japan and China and other East Asian countries where they use it for diet sodas and low-calorie foods instead of aspartame. No ill effects have ever been reported and it comes from a natural, cheap plant. Meaning it can't be patented and has no great profit margin so the FDA has illegally blocked it.
Too bad more Americans don't know about it or else the FDA could be pressured to change the illegal policy (natural foods with a long history of use by statute aren't supposed to be prohibited).