Effervescence is something I just inquired about as well on a FB mixers group. Essentially, from what I was told they just haven't created anything quite for that experience. I've been experimenting with TFA champagne and its good, but you won't get the 'real experience', it has a light vibrant taste to it and I enjoy it. I also used RF Soda in a couple testers and found it to be a little more acidic and dry of a finish than I enjoy. Might be able to balance it out better if I worked with it, but I wasn't overly impressed.