The replaceable pods are available in two resistances, 0.8ohm and 1.2ohm and feature self enclosed coil meaning that once the lifespan of the coil has been used you simply replace the pod, no messy coil changes. The pods are filled via a silicon stopper on the side making it convenient and relatively mess free.
The APX S1 is great for use with nicotine salts or freebase eliquid and is recommended to use a higher than 50% pg juice.