For what it's worth, he's selling the same thing as Lee Lovett. He doesn't actually understand neuroscience or how it relates to stuttering. He has improved his fluency and his has theories about how others can as well, but he has no real expertise. Also, he hasn't stopped stuttering. If you watch at [this video](https://www.tiktok.com/@ferris_michael/video/7229094494728244523) from his website, he has blocks at 1:30 and 1:41. He is speaking more fluently than before, but the neurological causes of his stutter are still there. By all means, check out his content if you like, and I hope you find some benefit in it, but I wouldn't believe everything he sells.