I've only been vaping for a couple of weeks, so I didn't vote, but I wanted to comment because this has been a BIG issue for me.
I lost about 60 pounds five years ago (by eating more nutritiously and adding exercise into my daily routine) after being obese through much of my childhood and adult life.
Smoking had been the one thing that I couldn't let go of. I started about 13 years ago. I had tried quitting several times in the past few years (I've never been a heavy smoker, usually averaged 1/3 to 1/2 a pack a day) but every time I tried to quit I would start gaining weight back. I have something of a compulsive eating problem which I have learned to keep in check, but when I quit smoking I couldn't seem to keep the self control and my weight would start climbing.
Anyway, about eight months ago I tried quitting again, and started gaining weight as usual. I told myself this time that I wouldn't go back to smoking no matter what, but after six months I had gained about 15 pounds and I started freaking out, and started smoking again. Doh!
But then a couple of friends of mine started vaping, and introduced me to the wonders of it all! I have been smoke-free for a couple of weeks now, and have been back on track with my nutrition plan and have lost a few of the pounds I gained. Yay!
I am optimistic that this may be the solution to a life long problem!