Ok, after all my reading, am I correct to presume that with a variable wattage device, you can set the wattage you desire for your atty(or several in my case), and the device will automatically output the correct voltage for your given atty's Ohm rating? If thats the case, then it would seem that VW is a better option for those who want "set and forget" functionality. Whereas VV would mean you have to constantly adjust the voltage to the desired vape/taste. I really need an experts fact based opinion on this.