I bought this about a month ago and I'm glad I did. It is the best thing I have put in my house yet. It has made the air so much better to breath in. I like how when I'm cooking it will filter out off the bad in the smoke and make the air much better that breathing in smoke. I like all the different setting on it. And I like how I can use it from an app on my phone when I'm not home. I like how it lets me know if the air is bad by the color of the ring on it. I will be getting more for each room in the house and some for my family.