I have been wanting to start a thread like this. Cuz, for me the CE2 is absolutely wonderful. I can't stand polly fill cartos any longer. So dry and tasteless in comparison. You're right OP, CE2's give a full rich smooth taste. One poster complained about spitting and eliquid getting on their tongue, I had that problem for a while - the vape was so good I put up with it until I figure out the fix. Definitely do not fill too full, and when the spitting starts happening just unscrew the CE2 and blow it out, screw it back on and you're good to go.
I ordered some new ones last week and the post office lost my order, along with my new juices. So, I'm stuck using my EMDCC's and really missing my CE2's until I get some new ones.
They do crack after a couple of cleanings (alcohol) and leak at the base when that happens. But, I just toss them once that happens. Still get to run through at least 15ml of juice at least, before having to clean them. I get mine from Lecig, and they are 3ml XXL - sort of confused about what other ones are out there. I got some fluxomizers and they aren't close in performance.