I am a huge fan of the shark ninja brand.  I recently moved to a state that gets affectec by smoke from wild fires.  This is quite new to me.  This purifier really improves the quality of the air I breathe at night in my bedroom.  It is the perfect size for that room.  I will need to invest in a larger model for my common areas.  This is very user friendly and it is satisfying to see the air quality numbers improve on the display screen.  I wish the filter was washable.  I hate to spend money on filters but breathing fresh air is worth it.