I am wanting to replace my iStick 50w with a similar mod but can handle temp control. I have an RX200 that I love but I don't want another. I have the iStick at home and it lasts for days between charges. I was looking at the Kbox 70w (http://www.myvaporstore.com/Kangertech-KBOX-70W-Mod-p/krkb07010.htm) Has anyone used this at all and can provide any feedback?