I've never tried LSD, but from what I've read, psilocybin and LSD are pretty similar in their effect. I've been doing microdosing of psilocybin mushrooms for some time, but I can't say I've had any therapeutic improvements to talk about. Obiously, it greatly depends on the initial state of the person, so I could see this therapy helping in overcoming depression or addictions, but I personally prefer a full-blown trip once-twice a year to take a break from my daily routine and evaluate my position in life