Nowadays e-cigs are not marketed as smoking aids or replacement for tobacco since whether they are perfect cigarette alternative or not, is still a debatable issue among health researchers. Perhaps the advantage of the e-cig is that the nicotine level in the liquid solution can be determined by the users, with some users preferring to use liquid solutions without any nicotine content. In such a case it may be argued that e-cigs are aids to smoking cessation.
The conventional cigarette releases nicotine as well as some other toxic products such as tar found in tobacco as it burns. This leads to the smoker getting the nicotine satisfaction but these other harmful products that result from tobacco burn causes far worse health complication. This is where the e-cig comes very advantageous compared to the normal cigarette, since it only releases nicotine stimulant only thus the user avoid the other toxic products found in tobacco.
With restriction of smoking places to users who use the conventional cigarettes, with e-cig the restrictions are not there. Meaning you can vape virtually anywhere and get your nicotine satisfaction without inconveniencing surrounding people or breaking any laws. This is because with e-cig there is no second hand smoking (they don't emit any smoke) associated with cigarettes.
They also don't give the user that smoking smell associated with burning tobacco, meaning you could be vaping the entire day and no one will smell it on you. This would be different if you were smoking the conventional cigarette.
