I got a brand new round copper, and I'm a bit disappointed in the 3.6v operation. not much vapor, mediocre flavor in comparison to my normal kr8's. the 6v is a bit too much though, I just took a hit from a hilton premium carto 11mg and damn near died. I took a hit from a normal carto that has TV atomic cinnicide in it, and it tastes burnt. damn. krap. not what I was hoping for. I guess I'll look around, or get that chuck I was planning on. I might even sell this to try to re-coup some of my funds. poo. I vape all night on a 5v PT, so I am a bit familiar with hv stuff. dangit.. this is worse than when you have high hopes for a new juice, and it tastes like the south end of a horse going northbound.