I've been using it for a couple hours now and WOW, this thing rocks. it blows huge clouds and the tank is Way better then my eleaf istick 20 watt with regular tank. I have it at 11 watts at the moment because 10 wasn't quite enough and 15 is to much. and I dropped from 18mg nic to 6. I'm vaping All Day Vapor " Milk Meee" juice that I got for 120 ml bottle for $30.00 at a local vape store. it has the .5 coil. I'm brand new to sub ohming but I think I found what I need. I'll keep you updated...