I've have done a lot of drugs and know a lot of people who have done a lot of drugs, and psilocybin is far and away the substance that is most loved and gets the best reviews. It's not even close.
Mescaline is _rough_. And honestly the "you are done with it before it is done with you" thing is 100% true, it is also very long lasting.
I have a plan to try it, DMT, LSD, 2-CB and 5-MeO-DMT before I'm 60, so I guess I'd better get cracking as that isn't far away for me.