Just got in my order of cartomizers, and 2 510 usb passthroughs today. My original intention for ordering the cartos was to find an easy way to get my dad to switch to vaping. He has been smoking for 50 years, has emphysema and has tried like me, to quit many, many, many times without any success. He and I have a monthly dad son day, and last time we went out, he tried my cigar, and seemed to really like it. I know the type of person he is, and realized that he wouldn't put in the time or effort to refill carts, or mod them to get the perfect vape. Well, after using this cartomizer tonight, on both my tornado and the usb passthrough, I have to say wow. These things are easy, convenient, and seemingly reliable. Granted time will tell on the reliability, but I have been getting consistent vapes all night, and I have been working this thing. I just wanted to say thank you to everyone for giving me feedback, and for the info I found in other posts. The only question I have left, is where can I get these in real flavors? The flavor they came with tastes kind of like unsugared, old tea, and I am not really digging it. Any ideas or suggestions?