I just got one as well and loved it.................for about 4 or 5 days. I think (still don't know for sure) my main problem was that i let it get down too low and it seems to have fried the atomizer (seems you should always tilt and roll your nova to make sure you got juice on the wick). It comes with extras but they are higher ohm ratings and produce cooler hits, which I'm not that big a fan of. I had the misfire issue too, but I adjusted the center pin and that solved it. While it was down and out I went back to my original tank and discovered it had a much better draw (for me at least, not a fan of tight draws), so now I'm in the process of trying to find the sweet spot where it makes battery contact but leaves the air holes fully exposed. I'm not quite ready to toss it but for what it's worth, I just ordered 2 more carto-type tanks like my Inferno came with. Think I'll rock those until I can pony up the cash for one those slick rebuildable atomizers like the Cobra or the Foggarty.