Love this simple to use humidifier. We have a large bedroom and I can immediately tell a difference when the humidifier isn't turned on! Our climate is very dry and we were struggling to breathe well while sleeping until we started using this. It's a simple design, and you can control the output. 1 full tank lasts more than 12 hours for us, so we just refill it every evening. Would love to have one in every room of our home!