I started using these last November 2018 after 40 years of smoking cigarettes. I thought I would try them out as they were on special offer. I had nine cigarettes left in the pack which I kept so I could go back to after i tried the Vypes, so convinced I was that they wouldn't really be an alternative to smoking. It is now February 2019 and the cigarettes are still in their pack! I have not wanted one, craved one or felt the need for one at all, time I put them in the bin I think