I use a vaporizer and I love it. I have asthma and smoking was really fucking up my lungs. I have no problems with the vaporizer though.

When you exhale a vapor hit you'll still see it but it quickly disappears. You'll never fill a room with smoke and there is almost no smell. That right there tells you that there is a hell of a lot less crap in a vapor hit than a smoke hit. It's like with a smoke hit there are thousands of compounds going into your lungs but with a vapor hit maybe only a few. Whether or not those few are bad for you I don't know. All I knowe is that the vaporizer had made a huge differnce for me, someone with lung problems.