The only way to know for sure is to talk to those who've had it done, either in person or chat or something. I can assure you though, there has been no editing on my part, lol. That's why I've been doing a lot of videos, I feel they're a good way to show real-world examples of how the voice sounds during natural speaking.
Even with Yeson you still have to go in with tempered expectations and follow all instructions. Nothing is ever 100%, but from my experience and those of the others here I think VFS is now a viable and relatively safe option. Like any other surgery you have to take the information that's available and figure out if it's right for you.