I tried it. As soon as I was done, I went to buy something in the store, and in the first few seconds, I didnt stutter, I felt, like I dont stutter at all. After a few seconds, it was the same. I say it does work, but in mu case, it's 50€ a session, and there are many sessions nedded. So if money is not a problem for you, I can say this will definetly help you.