RDAs were originally made to be used for mechanical mods only, but nowadays RDA's can be used on regulated box mods as most now support the low ohm resistance coils and also provide sufficient power. Most RDAs are customisable, you can alter certain components depending on how you like to vape e.g. Cloud chasing or flavour chasing set ups.
To put things simply, using an RDA is pretty easy once you have sufficient knowledge. With a little time and patience you’ll soon be playing around with different coil builds. With these rebuildable products, you simply wrap your own coil, install it securely and then thread some cotton through so that it can soak up any e-liquid dripped on to it.
Using an RDA is more for the hobbyist vaper, and it does require some knowledge, time and patience. However, the use of an RDA can be more beneficial than the standard sub ohm tank.