I purchased this for my child who has pretty bad seasonal allergies, but also for the greater home. We positioned it between the living room and my child's room in order to maximize it's range. So far so good. Seems to work on auto mode (which is very quiet)- it has kicked on high a few times while I was cooking. I don't have any issues with the smell I have read about in some reviews. We don't have pets so I cant speak to that. But, i do feel like it is functioning as designed. I find the controls a little confusing- as i don't interact with it daily so i forget what light means what and have to pull out the instructions. My youngest has accidentally turned it off a time or two. Having the vents on top i worry it will get dusty or one of my kids will spill something into it. But none of these things have happened. It's been about a month. No major noticeable improvements in allergies, but cant be hurting, i figure.