Reason for Purchase: Living in California in 2020 meant being exposed to a lot of wildfire smoke. For this reason, in addition to my allergies, I was interested in getting an air purifier. Why I bought this brand: I have previously purchased a Renpho fat/weight scale and have been quite happy with it. This item was available at an affordable price with a $10 coupon. Thoughts: Pros: 1) It's tiny and fits well in my small room. I put a regular sized folder next to it to scale the photos. It doesn't hurt your eyes and doesn't take up much space. 2) Easy to use. There are essentially two buttons, but you really only use one to toggle speeds (3 speeds and sleep) and the other to reset the filter. There is also a filter indicator that shows when the filter needs to be replaced. 3) Pretty quiet, you can adjust the power and therefore the noise of the air purifier. Disadvantages: 1) The cost of the filter. Replacement filters are $35.99 (full price) for 2 (currently $29.99). This is by no means exorbitant, but something to keep in mind. However, they should not be replaced too often. Overall impression: so far so good. Does what it promises at a reasonable price.