An absolute waste of money. First of all, the screws and threading were awful. Grind-y on all and one actually had the threading stripped. I had to basically insert at an angle to get it to catch. Even if I'd liked the way this vape, I don't know if I could build it again b/c of the threading issue. Luckily, that won't be a problem. The flavor wasn't terrible, though I had to cut down the massive amounts of airflow to taste anything. However, despite many pulls, I couldn't get the taste of cotton to go away and vaping it side-by-side with the same coils, same cotton, same resistance and power as another RDA that came in this shipment really highlighted the weakness and overall mediocre performance of the Yun. After my little experiment, I just tossed it in the trash. Trust me, don't waste your money.