I'm using Green Smoke now and I like it. I was at one time a 3 pack a day smoker and over the last few years it was 2 packs a day. It's taking a little time to learn how to vape but I'm getting the hang of it. The Green Smoke batteries have a lifetime warranty. If one ever fails to hold a charge just send it back and they'll send you a new one. They do use cartomizers but they are refillable. I have not noticed a 1 second cutoff. I can hit it as long as I like and it just keeps producing vape.
I bought 2 basic kits for $53 each. One for me and one for my wife. Each basic kit includes 5 cartomizers, a wall charger, a USB charger, a USB vaporizer (I'm vaping right now with the USB hooked to my laptop), 1 battery, instructions and a carrying case.
The only thing I'm having trouble with is learning how to properly refill the cartomizers.