The TW Tornado is a re-branded eGo-T. This is the worst of the two eGo tank systems we were warning you about earlier in the thread. It has the same 3.4V battery of the eGo-T. You can use regular cartos with it, but you'll just be paying for a poorly performing tank system that you don't use anyway and, when you remove it, you'll be left with a 3.4V version of a kGo.
Two groups of people are happy with their eGo-T. One group has had it for a few weeks or months and like it better than their mini-ecig it replaced. The other group has had it for longer, got tired of the problems and replaced the tank system with something that actually works. It is hard to find someone who stuck with the tank system for much longer than the first set of atomizers lasted.
Luckily for eGo-T/TW Tornado owners, the kGo/eGos use a 510 battery connection. That means you can use regular blank cartos you can fill yourself, or you can buy prefilled ones. You can also use any of the devices, like the CE4 Stardust, that are specifically designed for kGo/eGo.