i started with the shitty ass gas station carto's a couple years ago and they didn't work well at all but i started using the expensive shit they sell in vape stores in may and had pretty good results, good enough to keep me from going back to cigs but there's so many fuckin products out there and most of them have problems either with burning the wicks or not vaping enough fluid or leaking so now i finally know enough about it to match any clearo to any battery. i think stevey uses carto's...