I'm liking them allot. Have them on a Janty eGo, a DSE Ego, T-Rex, Hello-16, and a couple Tasty Vapor logo'ed 900 mah (ego) bats.
You can fluff the wick by pulling it up and out with small tweezers & stuff it back in. Badkolo, Banjoman, JJRose, br5495, naviathan, + many others have done a bunch of testing and mods on them here.
http://www.e-cigarette-forum.com/fo...13951-e2-cartomizer-technical-discussion.html
For me, they work pretty well almost right out the box. I pull the caps off, flush with vodka, fill by dripping down the side of the cup prime the coil with juice, put plugs back in and vape away. TH and taste like dripping with a LR atty, but the conveiance of a carto.
Have only had one minor leak out of five so far.
Edit: Almost forgot JJRose & ziodmam are testing/ modding too.