The appearance of this 'humidifier' is slicker than it's performance. It's plume is barely visible and although the machine gives you the option of a warm or cool mist , neither setting was effective in managing my a.m post nasal congestion. I researched the ratings for this machine on other sites and saw the consumer reviews varying widely. For me, it's performance was a poor dissappointment. I'm back to using my old vaporizer