I have used all the different CE2's that have been out so far, the only one that has even been close to good is the CE2R4 version 2 release of the XL in the 2.8-3.0 ohm Carto, I did just get in on a Co Op for the newer clear one and should be in the first group to get these in the states, they have made some recent changes and this next batch is supposed to really burn extra clean, I hope its true, if it is they will be good, the fillerless carto vape could turn out to be awesome if they ever get these made right.!!