I smoked a pack a day for over 20 years (Camel Filters and Marlboro Reds). Started vaping 3 years ago. I started off vaping instead of smoking during work hours and just smoked at home and on the weekends. Did that for about 4 months, then went to just vaping. I vape 6mg nicotine now and feel soooo much better! I went out drinking and smoked a real cigarette and it was horrible.
We had guests over the weekend: both heavy smokers. Let them smoke in the house, but the smoke and smell is offensive to me now.