I bought a eGo Twist the other day, and been using it with clearo's and it's not a bad vape. Today, I decided to take the original tank system that came with the eGo-c and attach it to the Twist. Wow!! I am vaping it at 3.7 volts and you want to talk about some vapor! Earlier, my wife was telling me I look like a dragon when I exhale my vapor cloud. I may be crazy, but, the flavor is much better on a Twist than on a regular eGo 650 battery. It's actually better than a few of my clearo's.