Living in Canada, the winters are very drying.  Since using the MistAire Ultrasonic Cool Mist Humidifier, we have noticeably noticed how our throats and noses are not as dry.  It is a very quiet unit and and one tankful is plenty to last the whole night while sleeping.  The added feature of the the night light is a neat feature as we have it on a stool, and thus prevents us from knocking it over in the dark.