Those little caterpillars will throw a decent cloud if all your ducks are in a row.
Battery/Mod
Coil or Coils (and alignment with the air holes)
Wick
Juice
I have one set with a .3 ohm 2 mm twisted 26 coil and it rocks--another one with dual twisted 28's @ .5 ohm and it also throws the vapor.
Will it be as good as a "competition" cloud machine? No but you can get in the same zipcode...
Can you make a boatload of vapor with these rdas..? Yes.