I just bought two e-cigs, a Joye510 and a DSE801. I wanted to try one that looked like a cigarette but also wanted one that the battery might last a little longer. I smoke about a pack a day when I'm in CA and at least two packs a day at home in OH. I fly out every week on Sunday and come back on a red-eye on Thursday night so I have to be prepared and I won't be able to get replacements while I'm in CA. Soooo I bought several bottles of juice from both Rocky Mountain and LitecigUSA and some extra carts. I'm hoping someone can let me know how long the carts and juice will last so I can plan for the week. At this point, I'm not even sure if I'll have the supplies waiting for me when I get home! If not, I'll have to wait another week to start.