I chain vape on a istick 30w, Kanger subtank mini @ 0.5 ohms 17W, French Vanilla (sometimes Vanilla Bean Ice cream) mixed with Creme de la Mente @ 1.5 nic. I just brought the kanger subtank and I hurt myself by vaping at 22W. I burned my throat yesterday. So now, I vape at only 17W with wide open vents. The subtank does cut down on my chain vaping. I used to vape every 2 minutes using a naturalist mini. I went to the subtank to build my own coils because BVC coils are expensive @ $17 for one pack. I was going through coils in 2-3 days. I'm going through more juice now that I use the Kanger but the flavor is just awsome and hard to give up for higher ohms.