Tolerance plays a part, as does thc percentage levels. I usually only need 0.3 to feel the way i want. But damn, i took one hit of this shit i bought the other day, and i was like, what's the point in smoking more, i'm ripped. Chilled high for like an hour then finished the rest of the bong. If i were with my friends we probably would've smoked 3 or 4 joints in that time.