Whoa, whoa, whoa... I wouldn't go so far as to call this vape inaccurate and inefficient. It's an excellent alternative to the Volcano. Some of us just don't have 600 dollars to blow on a high-quality vape like that. The Vapir One works magnificently. I've been using much less than ever before and smoking much more than before. It's a matter of getting used to it, two weeks into it and you have a specific temperature and a method down to using it. The temperature fluctuation shouldn't deter you that much from this product unless you're doing scientific experiments or something.