Did lots of stuff back in the late 60's and 70's. Many truly intense trips, no bad ones.
“We are all wired into a survival trip now. No more of the speed that fueled that 60's. That was the fatal flaw in Tim Leary's trip. He crashed around America selling "consciousness expansion" without ever giving a thought to the grim meat-hook realities that were lying in wait for all the people who took him seriously... All those pathetically eager acid freaks who thought they could buy Peace and Understanding for three bucks a hit. But their loss and failure is ours too. What Leary took down with him was the central illusion of a whole life-style that he helped create... a generation of permanent cripples, failed seekers, who never understood the essential old-mystic fallacy of the Acid Culture: the desperate assumption that somebody... or at least some force - is tending the light at the end of the tunnel.”
― Hunter S. Thompson, Fear and Loathing in Las Vegas; 1971
“Use them with care, and use them with respect as to the transformations they can achieve, and you have an extraordinary research tool. Go banging about with a psychedelic drug for a Saturday night turn-on, and you can get into a really bad place, psychologically. Know what you're using, decide just why you're using it, and you can have a rich experience. They're not addictive, and they're certainly not escapist, either, but they're exceptionally valuable tools for understanding the human mind, and how it works.”
― Alexander Shulgin, Pihkal: A Chemical Love Story; 1991