I vape, I also make my own liquid. I don't claim to know anything about the safety of vaping, but a lot of information I've read seems to indicate that it's considerably less harmful than smoking. A lot of the "dangers of vaping" articles seem to rely on sources that compare chemicals in cigarettes vs vapor, it's the smoke that contains all the toxins, not the cigarette. Another thing I've seen is relying on poor study practices, or (as was previously mentioned) poorly documented studies. Bottom line, for me, is that I feel a lot better since switching to vaping. I would not, however, recommend ANY non-smoker to vape.
TL;DR
Vaping seems to be safer, and if you don't smoke, don't vape.