As an ex-smoker and ex-ecig user, I do feel qualified to comment on this.
I smoked for nearly 30 years and decided I wanted to give up. I tried several times, then bought a cheap (so I thought) e-cig and tried it. It was OK, but not really satisfying. I then googled them and found sites such as nu-vapor and others where there are general e-cig users and then the complete nerdish e-cig fans (Like me!!!) I used to make my own e-cigs and loved it, from standard 3v to variable voltage..... see, I told you I was a nerd
I found it was a great help as nicotine is not the only (or worst) thing in a cigarette and some of the others are as addictive if not more so. This is why it is so difficult to give up by using nicotine replacement therapy.
However, because of the vapour produced with an e-cig, there is a psychological crutch coupled with the hand to mouth movement that is a real help. Most e-cigs (not including some specialist suppliers in US and UK) are made in china, and buying e-cigs from china is as safe as anywhere else (look for heaven gifts on the web, a good supplier who I have used myself). They provide a real selection although the ego tank and the joye 510 are very good simple devices that work and allow you to try the better types very cheaply.
These typically work better that those found in petrol stations (Gas stations), shopping arcades (malls) etc.
The real important part though is the liquid that is used in the e-cigs.... this is what is vapourised and enters your lungs, so this is where you need to be careful. I would NOT recommend any liquids made in china!
The liquid is vapourised and delivers flavour and a level of nicotine into your lungs. By using one of the devices mentioned above, or any refillable unit, you have the benefit of cost saving, and also a choice of flavour (I used to love apple pie and custard flavour as it did not make me think of cigarettes, or mulled wine at christmas!)
The vendors will usually tell you it is water vapour, it is not! It is either PG (propylene glycol) or VG (Vegetable glycerine) I preferred a mix of 7% PG (Gives better flavour) and 93% VG (Gives better vapour) if you use one of the devices above, then you can buy US or EU manufactured liquids with better quality control and also the choice to select your nicotine level from high (30mg/ml) to 0mg/ml or zero nicotine.
en-juice in UK or alien visions in US are both good, and I am not negating any other supplier in the US or UK, just these are two that spring to mind!
I hope you find this useful. As I said, I have now stopped entirely, but I do not think I could have done it without stepping down from the real-thing, to vaping (e-cig slang for smoking
) then quitting
Although expensive, I always liked my 610.... it was a rosewood pipe look-alike and went well with my tweed jacket and bow ties
I also want to point out, I do not have any business interests in the supply of the e-cigs or liquids, I just want people to be able to research the market properly without wasting money on cheap (but costly) sh... cra... rubbish!