So I decided to get a KGO kit but had a really difficult time deciding between whether to get the kit from Hoosier or the KGO CE4 Bundle and a passthrough batt from Northwest Vapors. After going back and forth with my options, I settled on the Hoosier kit basically just so I could start out with two cartos. I added two 10ml bottles of juice and an extra carto to pop in the free shipping. The pass through would have been nice, but I would rather start out with extra cartos to change flavors. I can always get one down the road anyway. The passthrough they have at Northwest is even a variable voltage. I'm not 100% sure what that means. I think the higher the voltage, the better the performance, correct?