Just gonna give my opinion but take it with a grain of salt. I tried the kr808d-1 's and they were alright for a beginner set; however, the battery life of majority of the cigarette like e cigs is drastically low. They usually come out of box only lasting three hours and within one to two months down to hour and a half, So i found it a trade off. One bulkier item such as the ego which can last me (as a moderate vapor) over a day and a life time battery life of six months or longer. simplicity of not always having to change battery won. Everyone however, has their own senses of requirements on what they expect from them. Mine just so happens to be lack of mess, not having to change
batteries often, and stable vapor production. All in all I also wanted to say that not only do the batteries included not last as long but they also charge you more than what a decent ego starter kit would cost you elsewhere if you put together your own kit....Anyway you look at it though it's apples and oranges. Bigger batteries longer lifespan, little batteries more concealable.