One of the best things about e-cigarettes is that it can be a great tool for those trying to stop smoking. There are different levels of nicotine that you can get in your vape juice, so you can start with a high amount and go lower and lower at a rate that you are comfortable with. Eventually, you can get down to zero nicotine. Vape pens, in particular, are a popular choice for former smokers because they resemble cigarettes.