I have an Elusion e-cig (I live in New Zealand) we have abit of a problem here in that you can only buy non-nicotine cartridges here but you are allowed to import nicotine filled cartos and juices for your own use. I started by buying a kit and ordering e-juice from freedomsmokeusa.com . The Elusion cartridges are actually cartomizers with the atty being part of the cartridge. It is essentially a 2 part e-cig. I have been popping the tops of my carts and re-filling them using the condom method or just dripping carefully onto the filler while rotating the cart. I have actually re-filled these successfully many time (up to 3 weeks) some last a long time, some only a week. I've found that if you over-fill you will flood the atty and it won't work until you have blown it out several times and let it sit for awhile. I also use a needle to make sure I can see daylight down through the centre of the cart and sometimes I give the air vents a poke through to make sure they aren't blocked.
If they are getting a bit gunky looking I remove the plastic end cap and lightly boil them for 10mins, the shake them out thoroughly and leave them to dry overnight. Sometimes I'm able to get another week out of them but sometimes they just don't work and then I've wasted juice re-filling them ....bummer

Unfortunately a 5 pk of carts is around NZ$22 over here so I'm finding it quite expensive. I am thinking of buying a Joye eGO, just the larger batterys, a USB charger and cartomizers. I'm not sure if I want to buy a kit with the 3 parts incl atty because I have never used that type of e-cig and I think I like the cartomizers for ease of use and not have to refill them more than once a day.
If any one can advise me on which cartomizers to use or any advice on Joye eGo's that would be great!