Reading bad review after bad review of this humidifier on the internet was interesting. We live in Colorado, where, inside our home the normal relative humidity in the Winter is around 16-20%. Our neighbors have two of these units and love them. I trust neighbors who live in the same environment we do, more than other reviewers. We bought two, set them up, and have had them running 24/7 for the past 3 weeks. Our inside humidity is now hovering around 40%. It took a few weeks to hydrate furniture, floors, walls, etc., but now I no longer get static-zapped every time I touch metal. Bottom line is... this humidifier works wonderfully, is quiet, and holds enough water for a full 24-hours. I'm thinking I might get two more.