I have a pax now and I love it...I also have a omicron lite with titanium KISS cartridge. I was in a shop the other day and was given the sales pitch for the Vapor Brothers plug in unit...the main selling point was that it is made with allnatural materials and that because the bowl was ceramic, there wouldn't be any inhalation of metals I plastics like other vapes.... This got me thinking...how harmful is it to use PAX? Forget the buds that are put inside, I'm talking about the metals and materials that are being heated up. They say it's a medical grade stainless...but who ever inhales this stuff? Pax users do! What about the KISS cartridges? How healthy is it for titanium to be heated and inhaled? Wish I knew more about what happens to these materials when they are heated like the PAX or KISS does! Do you? What's the best material to be heating to avoid inhaling toxins? Thanks!