Okay as a noob who is VERY interested in a VV the one big drawback is they cost allot of money, and there are so few of us are seeing the return, on our conversion from analogs, the initial cost still in our minds. I wish I had known about them, in all honesty, before I purchased the eGo system. IMHO the eGo, which is what everyone everywhere seems to suggest is great for a medium spectrum smoker, but, it quickly looses it appeal to those of us who were heavy smokers for many years. As a noob, the world of vaping is seriously confusing, most suggest you steer away from Mods and VV's until? Example is in a comment above about what voltage you should do use on this or that.... Trust me that really scares me away, I like most think I should wait again until? I know a VV would give me the type of power I need to STAY OFF analogs, but, alas unless the contest is who was born on Saint Patrick's Day ME ME!! I won't be able to afford one for a long time.