Our Shark air purifier has been awesome. Some of the great features includes remote control, variable fan speed, and auto settings. I also love that you can dim or completely turn off the lights in it. This comes in handy for us since it is set up in our bedroom. Excellent ambient noise for sleeping! The HEPA filter helps cut down on dust and other allergens in the air. You can visually tell the quality of the air by the color of the ring. Pretty awesome!