I personal think that it's bullshit, but there is a few stories of people who was smoking for 10 years and with electric cigarette stop smoked. I'm a smoker and i would like to stop that's why i need your advice.
if you can just quit smoking 100% then that's better. but vaping in exchange of smoking cig should be a first step of course to being a 100% non smoker in the long run.