Product review (5 stars): Works great - Silent and Efficient
I was apprehensive because the first type of desk humidifier I tried did not work at all.  This one works super on my work desk to help alleviate the dryness of air conditioning. I use it every work day!  I fill it with bottled water, plug it into my computer, and it runs for 3-4 hours before running out of water or turning off.  I like the safety feature that it will automatically turn off; but I do wish the auto-turn-off would engage when the water level gets low.  I've noticed that the unit may leak a little only when the water level gets low. So put a paper towel or cloth underneath it just in case -- during normal use it does not leak at all.  Be sure to soak the cotton wick for about an hour before using.  I leave some water in it to keep the wick moist.  It's almost silent.