This Shark Air Purifier makes a difference!  The air quality has been very poor around my area because of the wild fires going on but this Shark ran to keep the air clean.  The best part is that it adjusted automatically when the air quality changed.  A nice feature to have especially if you work.  This air purifier has also helped with my allergies.  This Shark is quiet and I don't even notice if it is running.  The coverage area is also perfect for my home.  Totally recommend it.