The quality and finish of the Breathesmart is impeccable; it's a beautiful machine and was definitely built with precision...it operates flawlessly, is ridiculously quiet, and looks amazing...BUT, I see no difference with my allergies after a few weeks of having it run. I have severe dust allergies, along with pollen, and don't see any difference with how stuffy y nose is when I wake up, and I have this thing running about 2 feet from my bed. I was hoping that this was going to make my allergies to dust (and everything else) go completely away, but I see no change at all unfortunately. I also see no difference in the "feel" or "smell" of the air int the house...other people mentioned a massive change in the feel of the air quality...I don't.