The product is good looking, it's small but is powerful enough to cover a large area. Our indoor air is super clean right now. I ran the 311 to test it to be sure that it works well for the wild fire smoke season here in the west. Even with clean outdoor air the 311 took our Purple Air rating from 15 down to 1 in a short time. So I'm certain that it will work amazingly well when I need it. At this point I can only review how efficiently they got the product to me and how extremely quiet it is when it's running. Great job Blue Air.