Quitting smoking cold Turkey is obviously best, but that is a hard thing to do. Vaping, imo is the absolute best way to stop smoking and has worked for many including myself. It's been 8 years since my last cig because of vaping and I feel like a new man. No more coughing, congestion, and I get sick much less often. It's probably not that vaping has made me better, but most likely the fact that I'm simply not smoking anymore. Is it 100 percent safe, absolutely not, but way safer then breathing in smoke....I dont like the thinking and saying that anything is not safe, like water and just breathing in polluted air, as that belief can justify any unhealthy habit, so I'm not a fan of that mentality. If you were a non smoker and wanted to vape because you thought it was 100 percent safe, that wouldn't be a smart move, but use vaping to quit smoking, very smart move....good luck my friend