Edit from 1.5 yrs of use (and bought another one).  Not as quiet as I would like, but still running strong.  I use the UV light more than I thought I would (not sure how effective it is though), and liked the unit so much bought another.  I mentioned how quiet it was, but had I to do over, I would have paid the extra $$ required to get a truly quiet air cleaner.  Even on lowest setting these are NOT that quiet..it sounds like at least 50db  to me, possibly much more.

Almost perfect...lacks the last star only because the cord is way too short (what were they THINKING?!).

I've tried several purifiers, including a huge round Honeywell (the ones from a few years ago) and this thing is just awesome as far as I can tell.  I had been running the Honeywell all day in our downstairs basement like room, so I turned it off as soon as I unpacked this model, and within 30 minutes I could tell a difference in the air quality.  While I MAY need to change the main HEPA filter in the Honeywell, I probably won't now given how much better this model looks, SOUNDS, and so far performs.  I will apply the money I was going to spend on that HEPA filter on another one of these puppies.

VERY quiet, stands upright, so it doesn't take so much floor space, and has the auto air sensor (which I am not sure if that is a gimmick or not).  Not sure if I am happy about the radiation for the UV light bouncing around, so I generally don't use that feature (glad they let you turn this on and off manually).

Great product for a great price ($69)
Edit from 1. 5 yrs of use (and bought another one). Not as quiet as I would like, but still running strong. I use the UV light more than I thought I would (not sure how effective it is though), and liked the unit so much bought another. I mentioned how quiet it was, but had I to do over, I would have paid the extra $$ required to get a truly quiet air cleaner. Even on lowest setting these are NOT that quiet.. it sounds like at least 50db  to me, possibly much more. Almost perfect... lacks the last star only because the cord is way too short (what were they THINKING?! ). I've tried several purifiers, including a huge round Honeywell (the ones from a few years ago) and this thing is just awesome as far as I can tell. I had been running the Honeywell all day in our downstairs basement like room, so I turned it off as soon as I unpacked this model, and within 30 minutes I could tell a difference in the air quality. While I MAY need to change the main HEPA filter in the Honeywell, I probably won't now given how much better this model looks, SOUNDS, and so far performs. I will apply the money I was going to spend on that HEPA filter on another one of these puppies. VERY quiet, stands upright, so it doesn't take so much floor space, and has the auto air sensor (which I am not sure if that is a gimmick or not). Not sure if I am happy about the radiation for the UV light bouncing around, so I generally don't use that feature (glad they let you turn this on and off manually). Great product for a great price ($69)