The humidifier is high quality, works great as advertised. The auto mode settings work great, just set the level of humidity and it runs until it reaches the setting. The sensor works very well. The mist levels are also excellent with a strong amount of mist at the high setting. I used it in a small room 8' x 10' to keep the humidity at 60%, it works perfectly. I also used it in a larger room 15' x 30' while watching TV. The humidifier runs well, super quiet. In a big room, it will improve the humidity level by about 5 degrees or so which helps improve the air quality in the winter. It's very well designed. It runs for about 55 hours if it's running constantly on 1 tank, and it shuts off automatically when empty. Great product. Highly recom...