Originally stevia was banned in 1990 unless it was labeled as a dietary supplement. Europe didn't allow the use of stevia until 2011.
If you have used stevia, you noticed that some can have a bitter taste if used in excess. Keep in mind that this isn't true with all stevia extracts. Try to substitute this very carefully because of this fact. Just because you have used one doesn't mean they will all be the same.
I'll be back tomorrow with more info to keep you sugar free and loving it!