I got 3 of these last week, and as said above, wish I had gotten the E1 instead. These work okay for me, but they have a terribly hard draw. Don't know if it's just the way it was assembled, but when I replace the innards I will check it out. After the first tank, I took it apart and cleaned and burned it just like any other clearomizer. I've used it up to 4 volts, but past that or hit hard at that level it can't keep up. A little wobbly on the top end by the mouthpiece. Vapor is OK, but taste is slightly muted yet. Gonna try the E1 next, but I've never found anything yet to beat a good CE2!