Y'all. I plugged this thing in yesterday about 3 feet from the litter box my two cats share. I had high hopes, but with a rather large helping of skepticism. These cats, man...they are adorable and cuddly and I love them to pieces, but they the absolute stinkiest cats I've ever owned. Yes, we've tried switching food/litter. Their litter box funk overrides every air freshener or odor remover or candle I've tried. In addition, our house is 116 years old, so it gets that lovely musty old house smell that's more noticeable some times than others (like in the warm, humid summers of Indiana). Our litter box is located next to our washer/dryer which is essentially in our kitchen. The room is approximately 220 square feet. Due to the layout of our house, the litter box is oddly in close proximity to the kitchen, our bathroom,and our bedroom. So the smell travels well. So, I get this thing in the mail yesterday, and immediately open it and plug it in. We had to leave for a cookout right afterwards. Came home 4 hours later and...the first thing I smell is NOT the litter box, for the first time in approximately forever. I intentionally left the litter box un-scooped before I plugged it in, so I could get a more accurate sense of how well it worked, if that makes sense. As of right now, I'm convinced it's made of magic and unicorn dust, because I cannot smell the litter box without standing directly over it. Incredible. About the gadget itself: it's roughly the size of a box of Kraft Mac and cheese. Yes, it emits a blue light from the front and top. I can see where it could be disruptive to those who are light-sensitive if it were located in a bedroom. But it's no brighter than any of the nightlights I own. Yes, it makes noise. It's a very unobtrusive "shhhhh" sound that is similar to (and no louder than) the fan in a computer. Tabletop/oscillating/box fans are louder than this. (Then again, I'd probably gladly take the odor-removing properties of this thing even if it sounded like a jet engine.) All in all, I'm amazed. We're getting ready to leave for a 10-day vacation here soon, and I'm always shocked at how musty and litter box-y my house smells when we come home from an extended trip (even with someone housesitting and cleaning the box regularly). So, if by some chance, I'm just imagining how well this thing works (with some nose-blindness thrown in), I'll know for certain here soon and will update my review. But as it stands...I'm not regretting a single penny I spent on it.