I have had experience with marijuana and meditation with some religious and philosophical experiences. However I have also had experiences where it stimulated the kundalini release and an increase in heartrate to the point at which I felt very anxious. Some sort of kundalini opening has been a common feature of my exploration with this substance and this doesnt always mean a corresponding peace of mind, needed for tranquil meditation. There have been a few times where I felt I would die, leave the body, because the energy was so intense and the body felt under great duress trying to process the intoxicant. This happened mostly when eaten in larger amounts. Beware seekers with sensitive systems!
Also I have found that even though it can have the effect of dispassion to the senses for a while it can also have the opposite effect, especially with food and sex, even for those who are strong in will.