Never disappointed with Shark products! This 3 in 1 Max Air Purifier works like a charm! We put in in a small 3 chair hair salon during COVID and it gives us a piece of mind. The room always smells fresh. We don't need to worry about other peoples germs. I like it especially during allergy season as well I think it makes a big difference. It has almost no nose when it's running. It also has a fan with a heat mode and the unit moves back and forth. Easy to operate remote control as well. I'm very happy.