So, I've been thinking about upgrading my set up. Like I said, I'm new to this, one month out from smoking analogs, and I'm currently using a G6 with mini tanks. I had a V2 starter kit before that and I used the cartomizers. I really don't like the taste of the filler stuff. I'm intrigued by the eGo C Twist. I understand that I have the tank option, like an EVOD. But what are those other things I see - they look like plastic tanks but I've seen them referred to as cartridges, with a squarish flat mouth piece? I've also seen some with or without that gross filler stuff. What are the benefits of the cartridges over the tanks? Thanks for your help!