Also remember that nicotine strength doesn't vary much between cigarette types in the US (full strength vs light refers more to tar and flavor). In the US at least, cigarettes are currently around 1.2mg of nicotine per stick. So one eRoll tank with 24mg juice is roughly a half pack of cigarettes. I'm still convinced that the nicotine delivered this way isn't as bio-available (meaning you'd need higher nic juice than the math suggests), but that's still open to debate so I'll just present this as my own anecdotal evidence.
That said, I found I needed 48mg during the first few weeks with the eRoll to get cigarettes out of my mind (1 to 1.5 pack/day smoker for 18 years, have tried quitting about 100 times before). I'm down to 36mg now and am cigarette free for 1 month (painlessly, I should add) and hope to be at 24mg eventually.
The reason for the seemingly obscene nicotine level is that the eRoll is most fuss-free when you use it like you used traditional cigarettes. Few reasons for this:
1) The tanks are small. Filling them 10 times per day will drive you batty while you are going through the quitting process,
2) The atty cone gets really hot when you chain vape, so it's more difficult to hold it like you hold a cigarette. Taking less frequent puffs alleviates this,
3) At 48mg, you'll actually
prefer the eRoll because it's a stronger buzz (like when you first started smoking),
4) It allows you to put the damn thing down once an hour or so -- I
hated having it in my mouth constantly, but YMMV here obviously.
The bottom line is that I wanted to replicate the cigarette experience as much as possible to quit (I even still go outside for my 'smoke'), because in my previous attempts to quit using PVs I ended up fussing with them all the time and using them constantly that when I needed/wanted a smoke badly and quickly (stress, drinking, etc), I'd go buy a pack of camels -- particularly if my atty burnt or something because I was sucking on it all the time
The eRoll + 48mg liquid gave me a better cigarette experience with very little hassle. If you find you
like using it frequently, obviously don't go for such high nicotine or you'll make yourself sick
My favorite tobacco flavors (have tried tons) ended up being Intellicig's ECOpure Regular and Wordup Ecig's Basically Tobacco. Both vendors will go up to 48mg.