My own use case is a bit different from many others who have commented here. I'm a reasonably fast typist and don't currently have any physical or neurological issues that might make typing difficult. I have tried voice input methods a number of times over the years, as I thought speaking would be faster than typing, but I always went back to typing due to accuracy problems and difficulty editing.
Aqua Voice does seem to be a significant advance. I'm going to try it out from time to time to see if I can get comfortable with voice input. If I can, I will subscribe.
I drafted this comment using Aqua Voice, but I ended up editing it quite a bit with a keyboard before posting.