My favourite VV is the one that puts electricity into my atomizers and makes vapour. Have a twist, LT, and provari, all of them work as intended. Though of the 3, the provari is the one that feels best as far as "I can fend off 2 dozen rabid toddlers with this thing and have a vape afterwards." You never know.
I don't have a vv, but now kind of want a provari. Never know when them darn toddlers are rabid