I am a novice as well, but I think some confusion, or at least why new users ask about nicotine levels so often, is because the delivery is different. With analogs, you knew how much each dart contained; 6mg or whatever per. With e-cigs, the measurement system is different - nicotine/mg - and this is somewhat confusing. I needed to know how much liquid my tank contained (eGo-c uses a 1.2mg tank, I believe) than put that against the ratio of nicotine in my juice. All of that against how many refills of my tank per day and I now have a good approximation of how much nicotine I am currently getting. It is simple math, but perhaps it eludes many and even with the numbers, it is still something to get your head around. I am confident (through feelings alone) that I am neither getting too much (nausea) or too little (typical quitting analogs feeling) with my vaping. I have, after just 3 days, found the sweet spot for me. Trial and error, but close monitoring will find the right answer for everyone.