That is true, I have been using both, either back and forth, or sometimes at the same time, for a while now. Avsha pointed out something earlier that is really relevant here, using both is harder on the the throat and lungs than anything. So during the initial change from smoking to vaping everyone coughs like crazy for a while. I still cough in the mornings when I take my first few puffs, and I haven't had a cigarette in 20 days. After about a week, the cough will start to subside and she will likely find herself breathing better. I know I smoked so long I developed a bit of wheeze, which has already cleared up. Better breathing also leads to better sleeping, which means feeling a little better in the mornings. I used to wake up dizzy, blurry vision, the whole nine yards.