You can get really high from an herb vaporizer, I use this one:
First time i used my vaporizer, I smoked heavy indica, which made me confused and really lazy, the consecutive times I got less high but higher then my bong, and I go through about 2 grams a day instead of 1 eighth
You can also vaporizer dry herbs such as teas and spices using an herb vaporizer, be sure to experiment