answer:It depends in part on how much nicotine you are used to. A casual smoker will have little trouble as e-cigs deliver as much nicotine aa normal cigarette. Since most people smoke less than a pack a day, it’s pretty easy. I have had slightly less success (though I’ve cut down considerably) because I roll my own American Spirit cigs which have about 3 times the nicotine; enough that regular smokers who bum one from me get a head rush after only a drag or two. However, the e-cig I have came in a nice, normal-looking pack that holds two batteries, seven filters, and a USB charger. After only a couple of weeks, I am down to about half of what I used to smoke. When you consider that I am used to a horse dose of nicotine, that is actually pretty good. The normal smokers I know who went the e-cig route have managed to quit entirely in pretty short order.