Okay I use a vapermate and I love it. I bought my Vaper on January 22, 2014 at 12pm... I never touched another smoke nor wanted one. I have OCD so I can easily become obsessed and I wonder if I vape to much. I use about 4ml of 18mg of nicotine. I feel great about not smoking and very proud of myself. I just dont want to over vape. I also have anxiety which makes the worry worse... but I feel wonderful about putting the smokes down. I turned 40 in February and my Mother had her first heart attack at the early age of 45.... so I feel I am improving my health by stopping the smokes.