I can't really remember how long it took to start with, I got an i stick 50w and delta 2, obviously I had tried ce4 before hand and took to it instantly I think then within the month upgraded to the sigelei 150 an subtank stuck to it for a while then maybe 6 months before I got married ended up back on the fags but told myself once I got over the wedding day I'd go back to the vape which I did within a week, that was nearly two years ago now.
I always said I could quit when I wanted I just enjoyed smoking, I suppose that's why I took to vaping so easily it was the same thing just tasted better.
My wife still smokes and it doesn't bother me in the slightest, I quite enjoy the smell still sometimes, still tastes like shit though.
I still on rare occasions may have 1 of those rollies with added chilledness but don't every consider going bk to smoking