Reading through everyone's posts there does seem to be a need to start out high ~ No, no, nic high.....I got some 16mg carts with my NPro, but quickly went to 24mg Johnson Creek (loved that stuff, Original tobacco flavor!) before I could really get a grip on the 'panic' button...I was a very heavy smoker for 44 years. I did manage to stay off cigarettes from day one, only because they tasted soooobad and smelled even worse! Vaping to me was CLEAN, so it did help. I did have a lot of high~energy and tremendously starving to death, so was in withdrawal for the first couple months. After that time went by, I actually cut back to 18mg, then again down to 12mg with no further withdrawal symptoms. VERY easy! Have been at that level for awhile now, but am very comfortable, and my juice intake is also steadily falling. (Some days not so much!) I also tried 36mg, but one cart made me very ill so got rid of it!
Just remember what you're NOT getting with e-cigs, about 4000 things I can think of. Makes it worthwhile, for sure. Like starting life over!