for dry herb

I want to start getting into this dry herb vaping thing and now looking for a portable convection device that is somewhat affordable. I was looking at the Utillian 722 and 620 and liked them both but not sure which one to choose. I use dry herb almost exclusively, I like to tweak with things...

Thoughts on the Nano? 1. Using Newest Black Ceramic Heating Chamber and Convection Preheating Technology, Pure Taste and Huge Vapor with Faster Heating. 2. Using Replaceable High Rate Discharge 18650 Battery, No longer have to worry about the battery is out of power. 3. Using a larger and...