This is a very good atomizer for the money. It doesn't have all the frills of some attys but for a flavorful, easy to build atty with good capacity, it's as good as anything out there IMHO. It's bottom fill only, but the base can be removed w/o draining the tank. It actually looks good, too. The deck is made for a single coil- much like a Kayfun deck except with a lot more airflow than the KFL, L+, v4, etc. Has a 4mm center air hole and two opposing oval holes in the base. No adjustability to the air or juice- just not needed- again, OMHO.