Ace, right now my main question is how efficient is it with respect to the amount of herb it requires to get reasonably good vapor? How would it compare to the MZ or the PD for herb efficiency. I really like everything about this, but the efficiency factor is important to me. I really dont expect it to be as efficient as a MZ or PD, but I wouldn't expect it to gobble up herb like some other vapes. Something between an MZ/PD and a VaporStore Vapor Tower (small bowl) would be acceptable to me.