Cheap vaporizers suck! I ask that anyone knocking vaporization also mention WHICH VAPORIZER you were using. Don't slander an entire method of administration just because you used a vapor daddy or some other junk.
I have had a volcano for about 2 years now, and I can't say enough good about it. I have, however, encountered many useless vapes that give vaporization a bad name. Many of them, you can't even get a single dense toke from.
The Volcano is multiple times more efficient than any smoking device. The flavour is, literally, 1 000 000 times better. You really can't fully appreciate the taste of your weed if you are burning it. Vaporization gently heats the plant matter, releasing the volatile aromatic oils (the flavour) without destroying them. Nothing that I know of compares to the flavour from a clean volcano with a fresh bag (As long as you aren't using schwag).
I save my vaporized weed and, once I have accumulated enough, make extremely potent cannabis butter. The efficiency is insane!
Health wise, it is also far superior. No carcinogens, no tar, no dirty headache after a long sesh, no black lung. I kept getting brochitis until I switched to vaporization.
The only vaporizer I can personally vouch for is the Volcano. Don't let the sticker shock scare you off, you get what you pay for.