Purchased an Alen BreatheSmart 45i for my office. I work in a day spa & it was the perfect complement to my clientele. It provided white noise in my spa room that was soothing but quiet. I liked the unit so much that we purchased 3 more at different sizes for our house. We really like the esthetics of them as well, they complement our homes & businesses great!
Been very happy with it so far, I like the fact that you can turn the lights off especially at night in the bedroom. I do notice when I cook or even use spray deodorant in an adjoining room that the purifier kicks into high gear. I'm very happy with it to say the least! Great investment.