Now I have the Provari from provape.com and I've gotta be honest with you all this e-cig is the absolute best e-cig I've had. I tend to vape between 4.2-4.5 volts (and now I'm sure of that number) and this thing ALWAYS hits at that level regardless of battery level, the computer system just makes this thing a pleasure to draw from. Durable too, I've dropped it many times, the only thing that's happened is I've bent my atty's 
Even dropped it once in the toilet! I really thought I was screwed then, figured it was fried. I let it sit for 2 days, to dry out before I touched it and it worked just fine. The only mod I really added to the Provari was the Empire 901 HEX Drip Shield mod from empiremods.com. Glad I did, it took care of the issue with liquid dripping on my shirt pocket, it has a deep well for overage, but as anyone knows you tip it etc, the liquid just spills out, the shield removed that issue.
Even dropped it once in the toilet! I really thought I was screwed then, figured it was fried. I let it sit for 2 days, to dry out before I touched it and it worked just fine. The only mod I really added to the Provari was the Empire 901 HEX Drip Shield mod from empiremods.com. Glad I did, it took care of the issue with liquid dripping on my shirt pocket, it has a deep well for overage, but as anyone knows you tip it etc, the liquid just spills out, the shield removed that issue.