I research things a lot before I buy, and it seems to me the 3 good ones are the volcano, the herbalaire, and the vaporbrothers.... in order of expense, but not necessarily quality.

I have heard a lot of people say the herbalaire gets more vapor out of the weed then the volcano. The company advertises that you can take the spent weed out from "the other major vaporizers" and get two more full bags out of it in the herbalaire. I've never done the test myself, but I have heard independent people claim it is true... I've never heard anyone claim it is not true. I don't mean to be kissing herbalaire's butt here, but its chamber has 18 jets to maximize the distribution of the hot air through the weed... the volcano only has 5 jets or something like that.

So... that's that, for what its' worth. A lot of people swear by the volcano, and I don't think you can go wrong buying any of the above.

I personally lightbulb vape right now because I'm a poor law school student. But eventually I'm going to lay down the green and get an herbalaire. I like that it can do direct hit or bag fill. It is half the price of the volcano, and it actually seems, to me, to be a better quality and better thought out vaporizer.