I tested DAF with a group of adults (n=7) of the local PWS support group. Worked for some… But results varied (i.e., was really useless for some). We noticed that a difference in fluency with the DAF device was dependent on: (1) where the stutter was manifesting (throat vs. tongue) and (2) the age of the user and the decades of negative conditioning (i.e., erosion of confidence) that happens from decades of dealing with unpredictable fluency. It didn’t work for me, because my stutter is (currently) originating in the throat and my baseline anxiety is super high. I think it could be good for fluency, but I find easy onset pre-speaking air flow and confidence building have been the best tools for my own fluency and wellness.