I just bought one because the weed although very good is so harsh I about cough to death. I got this APX pulsar 2 days ago and I think I fugured it out , I can never really tell if it's working because there's not much smoke. I like it because it hardly has an odor at all and it keeps me from chocking , plus I know I can take a few hits in any non smoking rooms but still with caution . The one negative thing I have found is that it taste terrible , especially the spent weed ,,, but it's a cool tool.