I found this question surprising. “Do they work?” At first I didn’t understand - work at what? Then I realized that you’re thinking of them as quitting smoking devices. They’re not that. It’s an alternative to smoking. You inhale fewer particulates but often more nicotine, and there have been some health questions about the oils that serve as a medium for the nicotine and how healthy they are to inhale. It’s not thoroughly understood yet and there’s a big range of products out there.
The companies that sell them will swear up and down that they are to help you quit. And some users of them will tell you how much healthier it is and how they’re halfway to quitting. This is all, essentially, lies that they are telling themselves and you.
If you want to see a nicotine abatement product, check out nicotine gum or patches. There is nothing enjoyable about them. They allow the user to divide quitting into two stages: first, getting the habit out of their system, and second, phasing out their nicotine addiction. They do not deliver any enjoyment or rush, and are designed to be clinical and dull. The gum is hard and has a medicine flavor and plain grey color.
E-cigs on the other hand, enhance smoking. They allow you to smoke in more places. They add fruity flavors. The gadgets are cool and the different things you fill them with are stylishly presented. You still go through most of the motions of smoking and you’re getting more nicotine than before.
Why would anyone consider that a quitting tool? It absolutely is not.