Smoked for 20yrs, quit for 12-1/2yrs, smoked for 7yrs again, vaped(30%) and smoked(70%) for 2-1/2yrs, and now for seven months after several devices and many juices I am vaping 99-1/2%, sill grabbing that occasional smoke. I don't think it will be much longer to 100% vape. For me, after stepping up to a more powerful device that could deliver the flavor and nicotine,(rechargeable V2's just weren't doing it), finding the right juice was the key turning point. Anybody out there that's about to give up on vaping...Don't! I believe you just haven't found the right juice for you.