Best humidifier ever! Bought this product last year ago and it has become an invaluable asset to our home. The cool mist is much more effective than warm mist humidifiers. I recently bought a warm mist, and returned it the next day because it kept overheating and would have to manually be reset. You do not have to worry about that with the cool mist humidifier; you can start it at night and it will run until morning. Also, this model is super easy to maintain and clean. A definite plus!