It’s curious that you ask for personal experience or personal research.  Did you mean to discount the decades of published research in using xenon for anesthesia and MRI contrast?  Anyway, if you’ll accept the opinion of someone who has merely read some books on anesthesia and gas physiology: my opinion is that this guy is full of it.  The physiology of small-molecule anaesthetics and serotoninergic hallucinogens is completely different.  And he doesn’t seem like a serious person.