I've been smoking cigarettes for 27 years and although I have tried other pen-like e-cigarettes and failed, using the pro 2 has been successful so far. From my first trial, I felt these were different and felt that they would work for me. It hasn't been very long (just a week) but I feel like this may be the one that does it. I did try normal cigarettes during this period but after 3-4 puffs I felt ill and went back to the e-cigarette. For me that's a positive and I'm still hopeful. Hopefully, I will still have this opinion after a much longer trial period. Wish me luck!!