Works just as well as the $50 one I bought last year same size.
I loved the price, cause I was in pinch and needed one immediately. I  get bad allergies and asthma.I bought one last year same size and everything, for about $50 unfortunatelyy the charging port broke. This one works just as well for a fraction of the price.Now I just need to find out where to buy new filters .
Rating: 4 stars