I love CE2s, but CE3 is a whole different beast. I ordered CE3's just because they were there and I didn't expect there to be much difference. Wow, terrible. A huge step backwards and a lot of unnecessary hassle.
Naturally, like many people in this thread I put the juice in not expecting it to pour right out, but of course it did. Not something I have ever experienced before or would expect with any cartomizer. Once I finally got it loaded up, the vape is OK, comparable to other cartos but all the extra hassle is unacceptable and a bit strange.
The CE2 cartos with the new soft plastic shell that does not crack are probably the best overall solution I have found after going through all kinds of vaping devices. They also are much more affordable than tank systems. If it burns out quick, no big deal, unlike expensive tank atomizers. For CE2's, like other cartos, I just jam the needle in, squirt, and its ready to go in a few seconds. Simplest and quickest loading process. Also probably the driest, most consistently leak free, and quickest and mess-free experience I have had vaping. Sticking with CE2's, its been ages since I had juice leaking everywhere as with ancient devices of the past, and I almost forgot what that was like and how annoying it is.
I don't understand the need to overly complicate a working design by having to use end caps, tiny rubber stoppers, slow filling etc. I don't have time for that, I'm not sure who does, and now I don't trust that the thing won't leak everywhere like many of the other experimental devices I have tried. I don't really mind trying out new supplies, and once more I have, but CE3 = huge fail. The tiny rubber stopper itself is ridiculous, and will absolutely get lost. My five pack came with some tweezers for handling the stopper, but they were incapable for the intended job and a waste to include.
Now I am sure somebody will like them somewhere, but in comparison to what is already out there, (like CE2) it seems pointless to use something that costs the same, practically vapes the same, and holds the same amount of juice, but is significantly more of a hassle to fill, more likely to leak, and is certain to have a shorter average lifespan once the tiny rubber stopper vanishes, as it is just asking for it.
I recommend CE2's to anyone with a long needle syringe. I do not recommend CE3's and will not purchase again. Do not want. I will remember to consult the forum first next time.