You are just trading one bad thing in your lungs for another. Might as well still smoke considering what some of these "vapors" have in them. They might not be as bad as smoking, but it's still not good for you.
I quit smoking 4-6-13 and haven't touched one since. Been over 2 years. I was smoking one day, smoked half of it, looked at it, thought to myself I don't need this anymore, stomped that one out and threw half a pack in the trash. Haven't touched them since.
First week was hell, second week was better, 3rd week a little better again, 4th week I felt great.
For 2 years I smoked 3ish packs a day, rest of the time I was 2 packs a day, towards the end I was down to a pack and half.
If you want to quit, just do it, don't trade one habit for another.