I've had my ProVari V2 for about 2 weeks now and I am still amazed. It is so simple to use and I have never been so happy with a PV. The ProVari is absolute precision! I don't know of much, if anything, that can top the quality, craftsmanship, or experience of it. I don't think I have owned or used every single mod or standard out there, but I can certainly say that I now have zero interest in trying anything else and am in the process of parting out my collection (just buying another ProVari to have for a back up, but don't think it is a must). The battery life is incredible with either the 18490/18500 or 18650, a full day with the 18490/18500 and a day and a half with the 18650 (I stick at 4.8v with a 1.5ohm dc and 6v on a 2.5ohm dc). I have to say all the safety features are a real plus, too, with the few instances of mishaps out there. What more can I say -- the ProVari was the answer to my collecting obsession (would've saved a ton of money if I tried this first)!