I've vaped for two years now and quit a 2+ PAD habit the first week. Well, not entirely. I decided not to go completely cold turkey at first (did that once and was a nervous wreck for a while). So, I still smoked a couple with coffee in the morning, 1 after each meal, and a couple at night to "relax".
I kept saying that I would quit the last few and never did. My logic was that those few, after tapering down for so long, would not be a problem. But, I procrastinated ... for two years!
Last week, I decided it was time to quit the last few. I had settled into a pack lasting me two, sometimes three days. So, I woke up one morning and handed my partial pack to my wife and announced I was through smoking. I expected to be in withdrawal soon after. A day passed, then two, then three, and I realized that vaping was preventing the withdrawal symptoms of quitting those last 6 or 8 a day. It turned out to be a non-event!
Tomorrow will be a week. Quitting has been a piece of cake. I think vaping would have allowed me to quit just as easily the first month as it did a few days ago. I don't miss it at all, although there are times when this little switch clicks in my head and tells my It's time for my <insert reason> cigarette. I just tell myself that I don't smoke anymore and there's no issue. I don't even think about it.
For a couple or three months now, I have been lighting a cig, thinking how bad it tasted compared to my ecig, and then I'd put it out after a few drags. Once I admitted that I hated them, quitting was easy. I just had to make the decision and it happened.
The hand to mouth habit would have been rough if it hadn't been for ecigs. Having something to simulate the motions of smoking (and get some nicotine) made the difference.