I received my NPRO kit on March 9th, 2009. That day, I smoked (some) of my last cigarette. The juice in the cartridge tasted awful. That cigarette tasted even worse! By the second day I found myself actually liking the juice flavor.
Thankfully, I was given three different strengths of liquid cartridges, and found that I really did need the High strength one, which I had already bought a bottle of refill liquid of both high and med. I had been smoking 44 years, was at about 3 packs a day!
The high in that case was 18mg/ml, but found myself unable to put the ecig down. So I went to a higher strength from Johnson Creek, the 24mg/ml, and have been quite content with that ever since. As I go forward, I am actually just now getting a handle on that strength and slowing down my sessions a little, going forward from here will try to either slow down "vaping" (hate that word!) or go to a lower density. Either way, I'm not setting any goals for now, will continue with this. Happily! But to answer your question: I set out to quit cigarettes, my mental state was set, I had to make it work. I did!! Look below: I made it, just fine!!