There are no unique opinion about the benefits or dangers of electronic cigarettes, despite the reviews of many doctors and scientists. So Portuguese doctor Antonio Araj, speaks openly about the benefits of electronic cigarettes, as an effective way to quit smoking tobacco cigarettes, this also indicates increased sales of E-cigarettes in Portugal. At the same time, American researchers claim that they have identified in the course of researches, significant doses of harmful substances in E-cigfarettes vapors, which exceed the safe level.