I've been reading up on the evils of aspartame, and found out that the FDA has been trying to kill off any sales of a natural non-caloric sweetener called Stevia (mostly due to complaints from Monsanto). Apparently Stevia has been deemed extremely safe in Japan, and is used in something like 40% of sugar-free products. So my question is, how does it compare taste-wise to apspartame or Splenda?