Let me first say why the score isn't a perfect 5. The noise. It's advertised to be quiet, but even on the lowest setting it isn't. I expected ac hums or something even quieter at power lvl 1, but nope. It's got an obnoxious oscillating sound.

Besides that, this machine works well. There's no way around it, but it looks like a trash can… a modern, clean trash can. It’s light weight and works well in purifying the air. With the seasonal pollen, this is the perfect machine to keep the room allergen free when we open windows to let in fresh air.