Bests & Worsts Reviews from Amazon

After owning this purifier for one day, its effect is very noticeable. Live in a 2BD/2BA apartment. The second bedroom is where we keep the cat's litter box. This purifier has reduced the smell of cat litter to the level that it goes unnoticed by me. We use lightweight litter and that seems to be dustier that your run-of-the-mill litter and that dust gets everywhere in that room. Also, I have not used the UV-C feature up to this point. I've still only owned this for one day, but was so happy with its immediate results that I thought I'd review. Any changes will be noted. As they say: "No news is good news." Be aware, some may say that it runs a little loud. Personally, if I were to move it into my bedroom and had it on the lowest setting, it wouldn't be too loud for me but I can see how it may be for others. If noise is an issue for you, find a different purifier. UPDATE #1: 12Jan2015 I have used the UV-C function and notice very little difference in its current environment. I run this purifier 24/7. Stand by my 5-stars so far. UPDATE #2: 31May2015 I've knocked the dust out of the filter a couple times since my last update and have kept it running nonstop since I initially review the product. Still awesome. UPDATE #3: 05July2015 I knocked out the HEPA filter yesterday and it was pretty packed with dust and the like. I take this as a good sign that it is still operating well. The recommended time to replace the filter is near upon me so I ordered another one that should be here tomorrow but I won't replace it yet because I don't think that it is necessary after the clean out. I decided to get one so I would have it on hand when I do decide to replace. Still 5 stars. No more updates will follow unless it explodes. UPDATE #4: 16March2016 So I lied; an update and yet the purifier did NOT explode yet. I changed the filter at about the one year mark after several cleanings to the initial filter. Some months ago I dramatically decreased the time that the purifier is running in a given day because it just doesn't seem necessary any longer. Recently (and I mean within the past few days) the purifier's three different fan levels have sort of leveled out. I mean to say that the LOW setting is an awful lot like the MEDIUM setting and not much different from HIGH either. I've had this happen to my automobile fan in the past. In this case, I think that some resistor(s) stopped working (well, anyways) so the fan is receiving near the same electrical current no matter the setting. The UV bulb has gone out but that might be normal for the amount of use it has seen. Strongly recommend this company. When this baby goes out, I'll be going with GermGuardian again. Update #5: 27Sep2016 No significant change. I don't run it nearly as often as I did previously (cat litter box went into a closet of its own to limit dust). The fan operates on one speed regardless of the speed selected. I'm toying with the idea of getting a higher-end model soon. We'll see.