I am skeptical of MOST MMJ to be honest. Some people I know are disillusioned growers.. and I say disillusioned because they say "if you knew the kind of shit they pump into the stuff most people are buying and smoking from these "legal" clinics these days.."
If you wanna smoke weed grow it on your own or buy it from your neighborhood friendly pusher .. lol probably safer is my point.
weed in an itself is of course, a wonderful tool to KNOW yourself, among other well documented uses :)