So far they have helped me to stop smoking about 14 days now.
Definitely relieve craving symptoms, easy to us with the screw on cartridges that also enable you to have a change of flavour easily.
The only drawback is the battery life, as the unit needs charging everyday but only takes around 30 minutes so I decided to buy a second pen.
Tried quite a few other brands but find this brand one the best.
If your serious about quitting or even cutting down give this a try.