I hate leaving low ratings
I don't know if this product works/is doing anything.  I've bought two, haven't noticed any air exiting the unit.  The 'imprints' on the side are nonfunctional, just for show.  I can't tell if it is on, and am uncomfortable to leave it running without being able to tell if something's malfunctioning. I hate leaving low ratings, absolutely hate it!
Rating: 1 stars