i wanted to try this to quit cigarettes because the hospital told me my chronic emphysema is getting worse. the device is small & simple to use, even the juice pods are easy to change, i cannot fault the design & technology at all. using this did cut down on my heavy smoking, but not enough to stop my cravings, maybe i should have tried their new nic salt pods, which i recently read are better for heavy smokers like me who are trying to quit.