Got mine yesterday. Put in a single 4mm Flatwire coil at .44ohms horizontally. Had the coil a hair too high and the flavor was good. Lowered it to where the top airflow holes hit the top of the coil at 11-130 and a very nice improvement in flavor. So far I'm very happy with it. I only have one bittersweet issue. I like the fact that the base unscrews so it makes it real easy to trim the bottom of your wick. It can be a pain in the ... though when you adjust your airflow and it wants to unscrew. Just make sure it's tightened up real good . So far no real buyers remorse. I can see though if you like to build, this is the atty for you.