These are the same as the ego stardusts. I have been useing them for about a week now with no issues, ilove them.. You do have to be careful of some of the cinniman flavors and spearmints. There is a list some where here on the fourm of what juices that have been known to kill them. They do not leek and are very easy to fill and clean. Most times I just run them under hot water blow them out and refill and vape away. If you are super patient you can wash them and then let them sit in a closed bowel of dryed rice for 24 hours. That really drys them out but it is not nessary, just might take a few good puffs to get them started again. The best I have found for trying new flavors. I actually have five more on order right now.