I went to an ayahuasca ceremony where I didn't feel a thing (it was incredibly expensive, by the way). I spoke with two other people who were at the same ceremony, and they didn't feel anything either. They didn't even offer us a refund or a discount for a future ceremony, and the organizer was very rude to us. PS: We followed the recommended diet, and I took three large spoonfuls. I was up all night, and nothing happened.
Excellent space for growth. They have a sustainable garden, yoga and singing classes, healthy food, very friendly people, and many human development activities.