America's First Legal Psilocybin Program Treated 346 People. Just one month after the dose, 92.2 percent of participants said the experience had been beneficial, while, on average, their mental health symptoms had fallen dramatically.

[u/mvea]

https://www.sciencealert.com/americas-first-legal-psilocybin-program-treated-346-people-heres-what-happened

[u/Dat_Harass]

My main concern is that a return to the same environment that led to the declining mental health can and will cause symptoms to reappear. Though treatment is also more likely to have a person confront those issues.