My friend has been one of the clinicians on the MAPS trials in Boston. He says it's abundantly clear that people are able to have powerful internal experiences of emotional opening, fear-reduction, release of bodily tension, and self-compassion and new understanding. And amazingly he says that these experiences are somewhat durable — people end up making all sorts of positive changes in their lives after these sessions (like giving up substances of abuse or feeling able to go off medication). And all of this has been backed up by the data. Any specifics you're looking for?