Review (2/5): Haven't tested yet. Hope I never have to. Good prepper tool
Ever since the show the Colony I've wanted one of these. It's the perfect tool to have for purifying water. I'd still run it through a particulate filter, but after that this should kill all the remaining bacteria. (Don't legally hold me to that, I'm not guaranteeing anything!) If it's done right though you should have clean water though.