I don't understand how the tank screws down you can make those airholes line up with the coils. And I don't like the drip tip. And its not easy to fill with a dropper cap. The reasonably sized one holds 3ml. With a .2 build like would do with an RDA, I am gonna be refilling that thing 6 times a day. Since there is a need to take a juice bottle with you with that thing, it seems more simple to just have an actual RDA and drip down its wide-bore top cap and directly onto the wick. This is definitely not a game-changer.
It is a game changer because of the airflow hitting the coils directly and the bottom-feeding of the wick. Also, the tank comes in 6ml.