Bests & Worsts Reviews from Amazon

I have no idea how to quantify how well this works, but I haven't needed my inhaler since we got it. Our neighbors (older apartment building) are heavy smokers and my wife and I were both bothered by it. It feels better now. We've been leaving this running whenever we're home. The touch sensor works well to turn it on and off. It does make some noise, but it's just kind of a low ambient fan sound that's easy to ignore. As an unexpected bonus it's really really good at filtering pet smells- I have two stinky male rats in the middle of rat puberty, their bedding gets changed every other day, and when they were due for a cleaning you used to be able to smell it across the room. You can't anymore unless you're right next to the cage. I honestly didn't have high hopes for this but it's worth it for that alone.