As usual for THC the quality is very good, everything fits perfectly. Building is a doddle, wicking - well, it's a dripper, there is nothing simpler. You can fit two big-ass chunky coils but no matter what you put in the airflow lets you regulate it up to your preference. Beautiful smooth and flavourful vape. One of the very few RDA's that can be used as a cloud chucker or a RDL relaxed vape and nothing is lost in between.