i bought this item one day ago as it was on offer; i don't want to give up smoking but did it on a whim knowing it's the right thing to do - i haven't had a cigarette yet and haven't needed one. yes, i know it's only 24 hours but i've rolled my own for at least 30 years and enjoy the whole ritual. i was concerned that a cartridge only lasts for "20 minutes intensive smoking" but it's lasted almost the whole of my first day - why does an earlier reviewer have to change it every hour? nonsense, you're not supposed to toke it until it's empty!! i would heartily recommend this aid to someone who actually wants to give up. it's not as deeply satisfying as a smoke but it does remove the craving and there's no lingering smell attached to your clothes - even i find that objectionable.
it's day 4 and i've discovered a great trick. when you get to the point of thinking the cartridge has run out, warm it up and try again. i find that more vapour is released and it lives on! it's taken me a while to work out the best way to use this aid. i started out holding it like a cigarette and inhaling as i would usually do but this doesn't really work. now i'm using it more like a drinking straw, giving it hard sucks for a few seconds then leaving it until the next time.