I have been using the 3.0 Ohm Smok CE2 style cartomizers for over a month now and love them. Way better flavor and vapor production then standard polly fill cartomizers. They seem to last me a lot longer than the old regular cartos too. You can also pull them apart and clean then dry burn them and keep on vaping. Plus they are the same price as regular cartos. I suggest doing a few dry burns before using for the first time. They have two big holes to ensure that the juice gets to the wicks. These also like to use a lot of juice but that does not bother me as I mix my own juice. I suggest these to anyone who is using tanks and wants a more flavorful vape.