I have so far now ordered ejuice from 3 different companies. One company, I particularly like their flavor, but even with an 18-24 level of nicotine, I seem to be having nicotine cravings. I did not experience this with the other two, even at levels of 11 and 18 only. I really like this company's flavors and customer service, but I think their nicotine mix must be off. Has anyone run into anything like this before? Or is it all in my head.....Don't know how this stuff is mixed, but I assumed it was sort of standardized.