Not to start a fight. I have considered and I will probably get the Provari once I save enough money after finding my perfect topper (apparently, I need to try every topper in the market). That said, I am a new vaper. Not even 2 months in. As a new vaper, I'm finding that VW is one of the easiest functions to deal with. If ease of use is key, why not the set it and forget it aspect of VW?
Different tanks, cartos, whatever you're using on top of the device will have different resistance and therefor will need higher or lower voltage to fire at for the best vape.