I've been using e-cigs since June 2008. I pretty much settled on Jane as my supplier for pen style e-cigs and her Toasted Toffee, 555, and Abandon Mint KicK Liquids. I get other flavors and also do DIY from time to time. I've also tried 510 and 901 models. I was curious about these cartomizers, so she sent me a pack to try. I think the ones she sells are KR808 and they need a different battery. So far, I've just tried what she sent and I really like them. They last a really long time. I think there is an improvement in how the taste comes through and its consistency. The draw is nice and easy and just right for me. And the vapor is a bit warm too. I am electronically challenged so there is a lot I don't understand, but I think the wick and wire running up through the center, instead of just sitting at the bottom, makes a big difference and really improves how these things act, taste, and feel.
The KR808s are a lot like a 901. 901s have great flavor, but they were a bit "noisy" and also didn't hold very much liquid. The KR808s sound like a 901 (which really is a minor thing and not an issue). The 510s however, don't make a sound. I'm still trying to figure out if they have a better flavor or not (regular cartridges) than the pen styles.
I also learned there are 510 cartomizers, so I'm wondering about those too now. Anybody have any experience with them?
ZoiDman, thanks for starting the poll. I'll keep track. I know I've refilled my cartomizers several times now. I also loved your tool site link. I just love good tools. What a bargain! - and I think it said they were stainless steel too! I'll have to spend some time there.
Someone else asked where they could buy cartomizers without labeling. Jane's (electroniccigarettesales.com) are just plain black with the level of nicotine printed on them.