I must say, I really like this thing. I have always shied away from unrealistic devices as they worry me about being hassled by law enforcement. I don't vape it while driving for exactly that reason. It is a big piece of steel and sort of looks like the memory eraser device from the men in black films: With that said this is the most impressed I have been with a device since picking up my first mini back in 2008. I am using stacked Vmax 18350 batteries and a 3 ohm dual coil tank with it. At 6 volts even low nic concentrations take my breath away. It is the hottest, thickest, vapor I have ever puffed on. So real. So close to real smoke it's almost a little scary. I have also tried 5ohm single coil carto's on it and that is pretty extreme as well. More vapor from the 5ohm single coil but the dual coil is killing it on throat hit. I recommend using setting 6 to keep the LED in off position so as not to waste battery life. I'm charging the batteries every 3 days with fairly heavy daily use. The ohm reader is dead on. To use it activate the LED using setting 6 then toggle to setting 5 and choose "DR". Whenever you press the button the ohm resistance of your heating element will display. The multi-meter is accurate and the 6 volt setting really gives 6 volts. This thing is a gem! In short if you are thinking about getting one you probably should because it is the bomb.