Thanks to all for information. I have wood floors throughout, and with the right light, it's amazing to see how much dust accumulates within just days. So that was one thing that interested me about the system. I don't wear shoes in my house, so it's just dust mostly. Occasionally, if I don't stay on top of it, I'll pick something up that's been sitting on the floor for long time (like a brake kit box :D), and there will be mildew starting. I use Seventh Generation spray on it, and it kills it right away, then I wipe it away. In Florida there's no such thing as no mildew or mold. It's a matter of keeping it at a minimum, or so I've heard. I don't have allergies, so I really liked the less dust and mildew control aspect.