I just ordered 2 Kanger pro tanks and 10 replacement 2.2ohm heads. I've been using EVOD's for about 2 weeks now and the pro tank was the next logical step. I've heard more good than bad about them so I'm really looking forward to getting them. A noob like me needs simple stuff to start with so the Evod and pro tank seem to fit the bill. I'll let everyone know what I think when I get them.