my gf uses the ones sold at ecigarettedirect.co.uk
before, she'd tried again and again to stop smoking by all sorts of methods but none of them stuck.
but she got a starter kit of these Halo ones and hasn't had a proper cigarette since. that was at least 18 months ago.
she says it's because she can still feel herself breathing something in, and she can see the vapour being exhaled. those are the things she missed when using patches.
i figure, even if these things aren't 100% healthy, they're still a lot better than inhaling burning tar, right? So it's a step in the right direction at least.
and a lot cheaper.