Yep, I get about a good week of solid heavy vapn from a carto in the AFS. The taste is awesome, and the throat hit is just as good... No flooding, no leaking, and no dry burnt taste what so ever. I started using a slightly larger hole and they work even better. I was making my holes at at .75mm and now I make them around 1.25mm and don't have to close the ring off anymore. They just stay soaked through and through. At 6v they are amazing.