The Provari is a fine PV and has much support. I personally like the Darwin for a couple of reasons. One, the technology: Darwin is the only PV that has circuitry that senses the changes in the resistence of the atomizer/cartomizer as you vape and
automatically adusts the power level to maintain a completely consistent vaping experience to your preference. Second, the battery life: I am a very heavy vaper and I get 21+ hours on a charge. Many have reported getting 30 hours or more on a charge. I plug it in at night and don't have to worry about carrying extra batteries during the day. Third, it doubles as a pass-through so you can vape while you charge. Fourth, it is the only PV, at no extra charge, that comes with a 2 year warranty on the device and a one year warranty on the battery.
The Darwin
Drew usually gets new shipments every 10 - 14 days.