So far so good.  This air purifier is quiet!  I wish the filers were permanent, but I bought it because the price was good, it is compact, it will kill viruses, and it covers a larger area than one would think, given its size.  I intended to use it at a family gathering in conjunction with another purifier (that I bought previously from Wayfair) in the large room  I thought most likely folks would be gathering.  I'd purchase it again.