When I started I was a 2+ pack a day smoker. I still vape the equaliant of that. Until recently I recently I was always looking for a better vape. Went though at lot a stuff. Finally discovered the rebuildable atomizers. I'm using a kayfun 3.1 clone with an Opus D now. It is the first time since I started in 2008 that I have been totally satisified. I went from a 36mg to an 18mg liquid thats how clean the Kayfun vapes and it has the best flavor of anything I've tried. Yes you have to learn how to build the
coils, but it can be mastered in a day enough to get started anyway. Within a week of playing around its nothing to now. The thing with the cartos and prebuilt atomizers is the best it gets is when you first take them out of the package its all down hill then you throw them in trash. The vender loves you cause you are regular customer. The money you save from buying the poorly made cartos you can now spend it on good liquid.