I just received some King Coils so I'll give my initial impressions. Metered out at 3.2Ω so I filled it up and set a Provari to 4.4v. Very good vapor and flavor! I've bumped up the voltage, 1/10th volt at a time, up to 5 volts with no issues. I like it a lot. Far superior to the standard Stardusts which have never worked for me. My only concern is how many refills this will go before the coil gets too gunked up. My experience with CE2 style devices is that cleaning them in water or PGA works ok but doesn't get rid of the gunk on the coil. With set ups that allow you to expose the coil to both clean and dry burn it, the coil is cleaned as good as new and I have never had one die on me. If this thing continues to perform this well and lasts for more than a week, it's a total win. The only thing I would like to see is the ability to unscrew the tank from the base which would make cleaning and dry burning (I know, you don't suggest I do this but how else do you get rid of the crud on the coils) much easier.