I don't know how many tanks and RDAs I have and don't use, but it's more than 30, and all because, since I started to use the Falcon mini tank, I just can't be bothered with anything else. Having wrapped my own coils for years, I never imagined I would ever be using a stock coil tank never mind using one to the exclusion of everything else, but there you have it. The M1 coils seem to last a month or more, I'm not even sure as I tend to throw them away just because I think they must be due to be thrown away rather than them giving a less than perfect vape. And speaking of the vape, I've never had such pure flavour from anything I've installed myself or any tank/RDA I own, which is proving to be a bit of a dilemma, and why everything else is pretty redundant at the moment.