The airflow design in this RDA is a good example of a common misunderstanding in the properties and behaviour of air. This misunderstanding is showing no signs of going away on its own so I thought I'd post this.

Air will not fall in from the top cap onto those ramps on the deck and down under the coil:

It's going to be drawn down the channels in the top cap via vacuum and immediately turn straight back up to the drip tip.

That's not to say great flavour can't be produced with top airflow because I know it can. What I'm saying is far too often designers are applying attributes to moving air that make it somehow more viscous and or heavier than the air in the same atmosphere around it.