I did a lot of research before purchasing this unit after our 18 year old warm mist Duracraft humidifier failed this year. There are not many warm mist units available on the market for some reason. This unit, on the high setting, raised the humidty in a large 12' x 14' room from less than 20% to over 30% in one day.
Warm mist, no white dust like the ultrasonic or cool mist humidifers
Fairly quiet, can be used in a bedroom. Sound is equivalent to a desk fan set to low speed.
Easy to fill, just use a pitcher and fill from the top opening on the right side.
One piece shell, so no danger of leaks from poor seals or glue joints.
As advertised, runs for about a day on the lower setting on one fill.
Heating element sits in a well making cleaning access diffiicult. I used an old toothbrush which works. Also, a cleaning tip is to use the more concentrated "household cleaning vinegar" rather than the standard cooking vinegar.
Not easy to carry when full - no handle or easy grip surface. Run it to almost empty before attempting to carry to another location.
January 6, 2014 Update:
A few issues came up after I cleaned the unit:
Make sure that the red float in the heating chamber is pushed all the way down. I didn't and water leaked from the rear vents onto the floor after I refilled the unit.
The humidistat becomes very erratic after cleaning - I have to turn it to max before the unit starts and then readjust to the proper setting an hour later.
If the unit runs dry, a red light comes on. You have to unplug the unit and wait about 20 minutes (after the water refill) before it starts again.
January 14, 2018 Update:
The humidifier failed today after 4.5 winters of daily use. I heard "sizzling" from the unit even though it was turned off. I unplugged it and after removing the bottom plate found that the seal around the heating unit had started to leak. The wiring ended up sitting in a pool of water at the bottom of the unit which was the source of the noise. Refer to the attached photo which shows the dissembled unit.
Since the warranty expired (3 years), I tossed it in the recycle bin.
I have purchased an identical unit in black which was discounted 50% at another major online retailer.
Imported from Japan or USA. It takes about 2 to 3 weeks to arrive.