 The study aimed to understand the opinions, satisfaction and usage patterns of electronic cigarette, e-cigarette, users. An internet survey was conducted among 81 ever users of e-cigarettes in 2009. Most respondents were men, former smokers, and lived in France, Canada, Belgium or Switzerland. They used e-cigarettes to quit smoking, reduce cigarette consumption, avoid disturbing others with smoke, or in smoke-free places. Positive effects reported by users included the usefulness of e-cigarettes to quit smoking, improve breathing, better physical fitness, and enjoyment of flavours and sensations. However, respondents also experienced side effects such as dry mouth and throat, and were concerned about potential toxicity and future legal status of e-cigarettes. The study highlights the need for more research on the efficacy and safety of e-cigarettes. This article was authored by Etta Jean-François.