Amazing tank, mouth to lung or straight to lung with 1.8 or 0.4 subohm vaping. The flavour, the vapor production, the top fill all brilliant. But using the RTA I've come to realise this is just an after thought. It seems like Aspire just want you to buy their premade coils because no matter what I've tried I've had three tanks just leak out of the airflow. For someone not bothered by the RTA then this tank is for you, if however your like me and want a leak free RTA give this a miss. I'm getting a refund and have ordered a Billow V2, very disappointed!