Well I haven't exactly used them yet. I bought one from gotvapes just to make sure it would work on my battery and it did. After using it for about a day, the mouth piece broke. I was using 12mg, blueberry e-juice that I got from mtbakervapors. Since the tip broke I thought well, I'll go ahead and order me some replacement tips and get a few more T2's while I'm at it. I got them from goodprophets and I got them in the mail today. So I went on a started putting some of my other e-juice flavors in them so I could get to try some different flavors and then I realize that these new T2's won't fit my battery. But while I was filling them, I went to put the tip back on one and it broke. Then just a few minutes ago I went to move the ones I had filled earlier to a safe place until I can order a battery to fit the new tanks and when I picked one of them up the tip broke in my fingers. The juices are all mtbakervapors, 12mg, and flavor in the one that broke this time is almond amaretto.
~Susiejo