Being an ex smoker and a vaporer for more than 10 years now I have continued to search for a tank that draws as a simply as a cigarette. The only thing I've found for this is the kanger unitank that has been around forever, with a screw center pin 510 mod I can adjust the air flow easily and the taste of the ejuice is the highest quality you can get (everything else I've tried so far diminishes the flavor of my juice). The only problem is their quality has become so bad that I find myself changing out the atty some times daily. I was excited when this was labeled "Tight draw" Sadly I was disappointed right out of the box. The only good thing is the quality, price, and ease of use for this Prism T22