RE:RE:Cartridge longevity I am with you there. It is on Kontrol to put up now. People are buying all kinds of bad "systems" already and we know their failings (from air filters, to UV lights, to portable air sanitizers). So you can't just sell them and claim that speaks for itself. Unless some here are actually invested in those other sketchy companies I think it is safe to say we expect more. Some here are already convinced but that is beyond me how they got there. I expect more.