I've read about supposed benefits of nicotine a while ago and got myself an electronic cigarette. I have never smoked before.

Not sure if there are any mental benefits. I feel a bit more relaxed right after vaping. No ill effects whatsoever. I made a few week to month long breaks to see if there would be any addiction - there was none. I was able to stop at any time.

It's sort of like snacking for me, but without the calories. Definitely contributed to my weight loss.

So did I. As a non-smoker, I got an "e-cig" simply because it contains nicotine and no tar.

Two years of off-and-on "smoking" has revealed that this cigarette replacement causes no addiction whatsoever.

Same. I'm very against smoking, but nicotine itself is likely not carcinogenic (though I'm concerned about heart disease - the studies I've read aren't conclusive but suggest it's a potential danger). I'll actually forget about it for days at a time, and don't refill it frequently, so I'm not too concerned about addiction. The mental effects are great for focus and it helps me to eat less.