Until an hour ago I've been using Ekowool (never used normal silica), I got my Helios and figured it deserved better than silica. I put two 1 Ohm coils made with 28 Gauge Kanthal in it and wicked it with twisted pieces of a cotton ball. My first impression, HOLY SWEET MOTHER OF vaping, this is how it should be. I feel like when I first tried an rda, the flavor, the vapor, the TH, its all awesome!