1. Health
The undeniable advantage is the lower health risk. For someone who likes to consume nicotine or engage in the physical act of smoking, smoking may be preferable to abstinence, even with its great expenses. Yet, vaping or use of other smoke free products is probably even better, all expenses and benefits considered, providing the vast majority of the benefits with very little of the health cost.
The evidence that smoke-free tobacco products are generally safe is based primarily on decades of research on smokeless tobacco use. Despite the popular myths, extensive epidemiology demonstrates that smokeless tobacco causes no detectable risk for any disease.
This does not mean it is completely harmless, however it does mean that any risks must be very small.

We clearly lack epidemiology about long haul e-cigarette use. Yet, we have ample evidence to be confident of the generally safe: We have the evidence about the okay of smoke-free nicotine from smokeless tobacco. The other exposures resulting from vaping – inhaling the carrier chemicals and tiny quantities of contaminants – are well studied in other settings. This allows us to conclude that the risk from vaping is down in the range of the risk from using smokeless tobacco. We have further reassurance about this conclusion from the real-world experiences of hundreds of thousands of vapers who have used the products for years, and from numerous formal studies of acute effects, which demonstrate
e-cigarettes don't cause any unexpected consequences in the short run. This is the same evidence and reasoning that caused the U.S. FDA to conclude that long haul use of NRT products poses no substantial risk.

While there are undoubtedly differences in health effects among okay alternatives to smoking, they are quite small and speculative. The net risk from all such products is so close to zero that substituting them for smoking reduces risk about as effectively as not using tobacco products at all. E-cigarettes may not be quite as generally safe as smokeless tobacco. Amazing closed systems, which contain just well-studied ingredients and exceptionally controlled heating systems probably are. Open systems are not quite as "clean," with a wider variety of e-juice ingredients, the choice of higher temperature heating, and a huge variety of hardware components. This has resulted in alarmist claims about the vapor from open systems, particularly when operated in completely unrealistic ways. In any case, the reality is that the quantities of potentially harmful chemicals produced remain small. It is important to keep in mind the absolute magnitude of the plausible range of risk. Even if a particular e-cigarette configuration doubles or triples the health risk compared to that 99% reduction in risk, it is as yet a tiny fraction of the risk from smoking. There is nothing to suggest it could be any higher than this, leaving the risk down in the range of that from other everyday hazards, like transport or eating garbage nourishment. On the off chance that such an item, rather than some marginally cleaner alternative, is the satisfying alternative that can replace smoking for a given individual, then the net benefit is self-evident. Indeed, in the event that someone merely likes it a ton better, those benefits can legitimize the costs; we all take small health risks all the time in order to pursue other preferences.
2. Flavors
The availability of interesting e-fluid flavors makes vaping more enjoyable, which is welfare improving in itself. Yet, beyond that, many vapers find that interesting flavors are critical for quitting smoking. E-cigarettes that attempt to imitate the taste of smoking, which includes a large portion of cigalikes, seldom make a convincing showing with regards to of it. It leaves many smokers feeling that e-cigarettes are an altogether inferior substitute, so why bother? We may like to think that the health benefits alone would overcome that, however people often don't act on that basis. Ex-smokers who tried to change to e-cigarettes yet kept returning to smoking often report that finding an alternative flavor that they liked was what made vaping better than smoking, resulting in their complete switch. Moreover, after using flavors that don't resemble tobacco smoke for a few months, most vapers who attempt a cigarette report that it tastes terrible and so never consider switching back.

There is a typical myth that interesting flavors are designed to attract underage consumers. However, there is no evidence – literally none at all – to support the claim that these flavors are particularly attractive to teenagers. There is, however, overwhelming evidence that adult vapers prefer interesting flavors and that many quit smoking simply because of them.
3. Esthetics
E-cigarettes don't produce odor and residue like cigarette smoke. Someone who is vaping efficiently and politely exhales almost none of the vapor, and there is no "sidestream" emission like you get from a smoldering cigarette tip. Along these lines, the emissions are minimally invasive and, as a separate point, pose no health threat to bystanders. Most non-users find the smell of nearby vaping to be somewhat pleasant, thanks to the nice e-juice flavors, unlike most nonsmokers' opinions of the smell of nearby smoking or the outgassing from the clothes of a smoker. There are places where vaping may be obtrusive, of course, and proprietors have the alternative of forbidding people from vaping in theses places in the event that they choose. Be that as it may, in bars, offices, and many other spaces where people may want to vape, it is no more esthetically obtrusive than holding some coffee or eating.
4. Convenience
Thanks to the minimal esthetic impact and lack of health impact on bystanders, vaping is socially acceptable in many places where smoking is not. Not having to step outside of one's office or a bar to vape is a major advantage over smoking, and is an important motivation for many smokers deciding to attempt e-cigarettes. In addition, the alternative of rapidly pulling out an e-cigarette and taking one or two puffs – delivering just as much nicotine as is desired at the moment, rather than having to light and smoke a whole cigarette – offers substantial advantages for many people.
5. Addiction
While there is more to be learned about this, it appears that vaping is far less captivating than smoking. Many ex-smokers who figured they could never manage to stop smoking have switched to vaping and then discovered, after a few months, that they could take it or leave it, or at least abstain for long stretches. They often choose to keep vaping because they like it and know it is lower risk, yet feel they could stop any time they wanted. Most experienced vapers report that they have substantially reduced their total nicotine intake, starting out high while quitting smoking, yet preferring less after a period of exclusive vaping.
Increasingly, reports are beginning to demonstrate that
electronic cigarettes are less addictive than tobacco cigarettes.