DAF recommend or not?

DAF recommend or not? I’ve had a stutter since 2nd grade (29 years now). In 8th grade, a speech therapist recommended I try Speech Easy, a DAF (Delayed Auditory Feedback) device. It initially worked wonders, reducing my stutter by about 50%. For a few months, I could even read aloud in school with only a few stutters. But over time, the effect faded, and my stutter returned to its original severity. Later, I overcame some of my social anxiety and became more comfortable speaking, though I still avoid long conversations when possible. Now, I’m considering trying DAF again, maybe using AirPods since I usually wear them. Has anyone tried DAF devices? What were your experiences, short- and long-term? Would you recommend them?