I used this humidifier in my apartment on the upstairs level during the winter months. I could tell a noticeable change in the air when running the humidifier. My family suffers from eczema and psoriasis so this product very much helped our skin issues during the winter months. My only complaint is that I felt like it did not cover a large area. I ended up buying a second one to put in my son's bedroom so I could have one in my bedroom. I also bought an additional one to put in the living room downstairs. I feel like I could have saved the money I spent on all three and paid for a nice one to cover all the rooms of my apartment. Output Volume The humidifier does not cover as large of an area as I thought it would so I was a little disappointed by this. A full water reserve tank can last through the night though and that is helpful. I am not having to get up throughout the night to refill the tank. Performance The humidifier does help dampen the air, but it does not cover a large area. Ease of Cleaning The water reserve tank is easy to clean with a little soap and water and bleach water. The filter is easily changed out as well. Durability The humidifiers are very durable. I have been using my original one for approximately five years and my others for four years. Design The design is very simplistic.