Bests & Worsts Reviews from Amazon

I almost left them a bad review... So I plug in the unit and everything looks great: it's super quiet, everything as described. I put it in the "auto" mode and the light is blue, which indicates that air quality is good. I live in Los Angeles and with all the talk about how our air is terrible, I expected to see the light to turn--at the very least--green or yellow. So I was just wondering if the thing was even doing anything? I left it on for another day. The first time I realized it's actually working was when I was cooking fish and there was quite a bit of smoke in the room. The light went from blue to green to red in a matter of minutes and the unit became noisier and it was obvious it's working hard. As soon as the smoke cleared, it went back to it's normal, quiet, state. But the best came in about three days. I noticed there was significantly less dust on my TV stand. Normally, it's all dusty in 3 days or so. There was hardly any dust in a week. So, it definitely works in filtering out dust, which is a win-win in my book: less cleaning and cleaner air to breath!