I quit smoking and started using an e-cig from mister-e-liquid last July. I havnt touched a cigarette since. I started out on an e-go with the vision tank, and used that for about 3 months. At that time I upgraded to a Proveri Mini, with the carto tank, and I havnt looked back. Being able to change the volts is really nice, and also having batteries that you can change out instead of having to charge your entire unit is so nice. I started out at 24 mg nicotine, and now I am down to 3 mg. They don't offer it in 3mg, so I buy a bottle of 0mg and a bottle of 6mg and mix them. Just make it a goal to drop a level of nicotine every few months.