I can say, the method works everything you guys described is mostly true. It is a step back but only for 3 weeks. You have to speak slow and have to do it everytime. If you do that i will get better i can say for myself. You get much quicker and it will only take 7 seconds or so to say a sentence. This is hard. But after this you will still speak with a technique for a few weeks but this a easy one and no one will notice it and you can speak very fast. And after this your diaphragm is used do moving fluently and you don’t stutter anymore ever!!! Your diaphragm is a muscle that can be trained. I know people who don’t stutter anymore with this method. Sidenote: if you don’t hate stuttering don’t bother because it is very hard for 3 weeks but you have to do it everytime. After these 3 weeks it will get so much easier and your life will get better. It only works if you are motivated. And if you don’t want to give everything for a short time in your life that’s okay but it is worth it. I compare it to a broken arm. You can either let it be broken and carry that for your whole life how painfull that may be. Or you can have a shit couple of weeks with your arm in a plaster cast. And you will have a free life! The first weeks are shit but will get so much better if you do it with everything you can. I cannot recommend this more. And if you don’t want to do it and are okay with it don’t do it but if you hate your problem do it!!!