As all the stop smoking products have found, there are several components of smoking, only one of which is nicotine addiction. One is social, one is "something to do with my hands", and the other is that many of us just like to smoke. I started with 24 mg e-liquid and it knocked out my nicotine cravings at once. I haven't smoked an analog since. But I like the taste and the act of smoking enough to overdo it, with attendant dry mouth, sleeping disruption and even some palpitations. Yikes. When I started ordering more e-juice, I got a whole range from 0-24 mg nic/ml. I rarely hit the 24 any more, use 12 for cravings and either 6, 3 or 0 for enjoying vaping. I've smoked both cigarettes and pipes. Vaping is more like pipe smoking to me. Love the taste, the aromas, sipping my ego-twist over a cup of tea or a drink. I quickly learned what it feels like when I've had enough of the nic, and switch to something lighter. Or -better yet- stick to the lighter ones unless and until I get cravings that aren't being satisfied. Now 2 puffs on the 24 is enough and I'm back to the lighter juice.