Nectresse

Okay, I have GD and I was looking into no calorie sweeteners. I am allergic to aspartame, so any of the ones with that were automatically out. I saw a commercial for nectresse (I'd never heard of it before today) and I saw that it was an all natural sweeter with no chemicals. I was wondering if any of you have tried it. Was there a noticeable aftertaste? Did it incorporate into drinks easily? Does it have that immediate chemical taste (like I seem to get with Splenda)? Thanks for your opinions