So I'm new to vaping.. I haven't had a "real" smoke since I got my Vapor Titan Ultimate Kit.. As for the auto batteries, ugh! I find them kind of hard to draw from, so whenever I'm home - I'm on the USB manual! I wish I could exchange the autos because in the future I only see myself using manuals but sadly they only offer autos with the kit. So for my two cartos I got Cool cart Nuport -36mg, and Cool Cart - Traditional Menthol 36 mg.. I like the Nuport best out of the two, but I've been reading a lot of forum posts and it seems that the tank is the way a whole lot of you seem to go, and I like the idea of mixing flavors. Part of the reason for the switch to vaping was to be cost efficient and from what I've read here I'm guessing the tank gives you better bang for your buck over prefilled, or blank carts? Some pros and cons before I place my next order would be great! Thanks!