I quit smoking with them but it was more about harm reduction for me. They’re obviously less healthy than not using it at all, but everyone I know who quit smoking using an ecig has their own anecdotes about how they felt better after switching. I used to get bronchitis flare ups every flu season but that hasn’t happened since I switched. I don’t cough up crud all the time, I can climb stairs without getting winded, and I smell like fruit instead of cigarette butts which I’m sure everyone else appreciates. My nic level is also so low now I’m basically just vaping flavored vegetable glycerin.