After using the KOIOS H13 True HEPA Air Purifier for several weeks, I'm impressed by its performance. The 360° air intake and three-stage filtration system really do make a noticeable difference in air quality, especially in my bedroom where I suffer from allergies.

The purifier is surprisingly quiet on its lowest setting - so quiet that I often forget it's running until I see the gentle glow of the 7-color night light. I particularly appreciate the aromatherapy function; adding a few drops of lavender oil to the included pads creates a relaxing atmosphere perfect for winding down at night.

While the manufacturer claims coverage for 1200ft², I found it works best in spaces around 300-500ft². In my 400ft² living room, it cleared cooking odors and pet dander within a couple of hours. The filter replacement reminder is a thoughtful touch that takes the guesswork out of maintenance.

The only minor drawback is the learning curve for the scent pads - it took me a couple tries to get the right amount of oil. But once figured out, it's become one of my favorite features. For the price, this purifier offers excellent value with its combination of effective filtration, quiet operation, and bonus features like the color-changing lights.