I did 9watt and it seems like it's better. I did get a dry hit, so I guess I'll have to drip some juice on to the coil and let it sit for a while when I turned it to 15watt to see what would happen. Hopefully I didn't burn it up, I think that's my last coil. Fortunately my next one came in today, so I'll be using that instead of the istick for a while. Not sure if I should sell it or just do something different with it. Not sure how much I'll use it. I quit smoking a long time ago, but when I started hanging around people that smoked, the urge was crazy and I started smoking a bit here and there. The vaping keeps me able to quench the occasional urge without resorting to smelling horrible.