I purchased a vaping kit in December last year, I found I would only use it when I got a craving and unlike a cigarette you don't have to "finnish it". So my nicotine consumption went down, I also used liquids with less nicotine in them to step things down as well.
In March this year I gave up altogether, I still keep my vape kit but it has nicotine free e-liquid in it. So when I went out for a few beers I could go out with all my mates and not be the Billy no mates in the pub waiting for all the smokers to come back in.
Now I don't even use that, just go out and chat with all my smoking mates.
I think they are great things, but the odd thing is I never like the cigarette flavoured e-liquids and preferred fruit ones or Grants Vanilla Custard (my favourite).
There is one thing you need to remember you vape in a slightly different way than you smoke a cigarette, but you soon get used to them.
Good luck to all who are trying to give up, it is not easy at all but you can do it.