I know there seems to be this craze for these cartomizers or clearomizers or tank types, and even I thought it was good on the surface. However, after using them for a while, I realize I spend more money on juice and replacement atomizers even though they cost a couple bucks. They always flood and I end up wasting juice from the big tank with the sleeve, and I wish I could clear them out the way I could with the older atomizers. I actually spent less money on the old cotton fill atomizers and got the same if not better vapor. I got mixed feelings with these smoke tanks, cartomizers, or clearomizers ma-call-its! I was intrigued at first, but at the end of the day I added the numbers and I actually spend more because the juice burns faster with the dual coil, so I go through juice faster and then the atomizer floods itself and I can’t clear them like the old atomizers. I’m switching back to the old style. The atomizer cost 5 times more, but lasts 10 times longer than these cartomizers… Just some enlightenment from a veteran vaperer.