I was so excited to get this Shark air purifier! It has been a great addition to my home and has helped with the air quality. The machine is very quiet on its low settings and makes some noise on higher settings (3,4) that has been helpful to me when sleeping at night as white noise. The lights on it can be dimmed in case you don’t want them on at night, which is also nice. Plus, it’s small enough that it’s easy to carry around in case you want it in a different room!