this seems to be a wide topic what would be the best way to smoke? a short strong burst? a normal cigarette type drag? or the slow lingering try to fill your lungs puff? i have the ruyan v8 now an it seems to produce alot of vapor before if u dont inhale but if u do none to almost untraceable is exhaled. in contrast i own a v9 and even with a small drag from it after inhaling when u exhale there is some serious vapor cloud being expelled.