Shameless obvious advertising aside, "I know from experience, dude" and I know like 30 other people for whom fluency shaping doesn't work. In fact, I think i've only met one or two stutterers who have ever been able to benefit from fluency shaping. The more you chase fluency, the more power it has over you. Programs like this in infallible with their ridiculous claims that if you put in the effort, it will work! And if it doesn't work, well that just means you didnt try hard enough. Approach with caution. You may be doing for long term harm for very short term gains in fluency.