It doesn’t permanently fix you, nothing can and they state that this is not a cure, it provides you with the tools to manage your stutter and speak eloquently and with the belief you do have a voice. That said, it was bloody tiring and even when you have a few days off from practicing, you can very quickly start slipping as I did. For the first few weeks after my first course, I felt on top of the world, only then did I start being complacent and now years later, I back in a rut again.