I started M2L on a Vplum vape pen. After 2 weeks I purchased a kanger toptank mini and built coils to run at less than 16 watts to save money on the premade coils that I was constantly burning out.. I would recommend a kanger toptank mini kit. It has a replaceable / rechargable battery (you can have on in the mod, one on the charger and no down time) and you can do M2L.
If you are craving cigarettes, up your nicotine level by 3mg and when you have that craving, take out your vape and sit down and take a 5 minute vape break. Just like a smoke break, you puff your vape 5 minutes and the cigarette craving will go away. You do have to commit though. I found the hardest times after eating, before bed, with coffee and while gaming on PC. (LMAO.. btw.. vapes don't burn down to the butt while killing monsters or typing in forums, many is the cigarette I lit, puffed once...then butted out because I was looking 3 inches of ash on a filter...)
Most of the "craving for a cigarette" is mental. You get used to having one with coffee so you are in the habit of lighting up when you have a coffee. Just vape with your coffee instead. M2L takes care of the physical aspect of puffing and bending your elbow and keeping your hands busy. I was down from 18mg to 6mg after about 3 months and down to 3mg within 6 months. That was just my choice to lessen the nicotine I was inhaling. Since nicotine alone is pretty harmless, you could stay at 18mg for the rest of your life and still be ahead of the game. The thing about sub ohm.. is you get bigger clouds and more nicotine per puff. So if your cloud is twice as large, you only need half the nic.
2 1/2 years later, I still vape, I use 3mg and have no craving for a cigarette whatsoever. The only down side is sometimes I dream I smoked a cigarette and wake up feeling guilty, until I remember it was only a dream. *did you know you can taste in your dreams? (GAK) lol I still remember tasting cigarette when i woke up.
Now for the sake of cost... sticking to M2L at higher nicotine is much cheaper than sub ohming at 3mg, you go through much less juice. Say 4-5ml per day vs 15 to 20+ per day. So M2L a 60 ml bottle would last 15 days vs 4 days for me.