I loved the Billow v2 a lot but since the coming of the velocity-deck for the Aromamizer, the Aromamizer is now my primary tank. In terms of build quality, I do find the Billow v2 better. What make me choose the Aromamizer over the Billow v2 is the flavor that the Aromamizer can give and also the simplicity of building coils on the velocity-deck. I still do use my Billow occasionally as I still do find it as a pretty good tank.
Additionally, they have just release the OCC coil for the tank (see last pic), the coils aren't cheap compared to Subtank but it sure does pack a lot of flavor and cloud. Good to have it as spares in case of emergencies
. Currently only Kanthal but they are working to release nickel version as well.
Here's some pics of the deck and the Aromamizer:
Dual-coil 30g Nickel build...love the simplicity in wicking...dripper-style
OCC Coil for people who can't find the time to rebuild.
Additionally, they have just release the OCC coil for the tank (see last pic), the coils aren't cheap compared to Subtank but it sure does pack a lot of flavor and cloud. Good to have it as spares in case of emergencies
Here's some pics of the deck and the Aromamizer:

Dual-coil 30g Nickel build...love the simplicity in wicking...dripper-style


OCC Coil for people who can't find the time to rebuild.
