having put 10ml of juice through the new tank.
and running @ 25w with an atlantis 0.5 coil .puffin twice @ 6 seconds and 1 @ 8seconds each time.
the air flow keeps the vape very cool , huge clouds and a nice taste.
reason for using atlantis coil , was so i could compare it with an atlantis for air flow,taste,coolness etc.
the bottom airflow is more than enough , but with the top airflow open ... wow just wow @ the amount of air you can get.
Top filling is simple to use and makes using a sub ohm tank (they really go through the juice) so much easier and less mess and hassle.
Only improvements i can suggest is a full set of spare O-rings in the box and if possible a lock indent on the full open setting on base of tank