I got this about a month ago because I got tired of waking up with sore throat. It's pretty dry here all year round in Colorado Springs due to the high altitude. I definitely noticed my skin not itching after about 3 days. It is set on low at 55% and it does run constantly because we do have very high vaulted ceiling. The noise level isn't too bad after you get used to the low humming, almost like a floor fan noise. It does get pretty loud on medium and high setting. I don't have problem with the tank not draining as other reviewers did, may be their floors aren't level? After I fill up both tanks, they last about 3 days. It is pretty big, but not so big that it gets in the way, it's about the size about a small suitcase and we have it sitting in a corner wall. I only wish they had a different model where you can switch from cool mist to warm mist for the winter, but I didn't notice that it made the room that much cooler.