It works and I just bought another one... though it's quite noisy
It works well without creating ozone (pollutions) and requires no cleaning.  Its fan is noisy enough to disturb my nights (I'm a light sleeper).<br /><br />Initially I purchased it for use in the bathroom but I soon found other uses.  I added an extension cord and set it in the musty closet for a day and the odor went away. I also got this washer/dryer combo which smells really awful (because someone left the laundry unattended for a long time).  I tried many professional cleaniners specifically made for washer but none worked.  The odor (and the germs, I presume) just wouldn't go away for at least 6 months.  So I unplugged the washer and made sure it's completely dry then I tossed in the GermGuardian and closed the door as much as possible without pressure on the extension cord.  Let it ran for about 6 hours.  And the odor/germs went away for good.  (Disclaimer: I'm not suggesting any unintended applications.  I just want to show that it does work against germs.  Follow the instruction manual for safety.)<br /><br />As for the fan noise, I have no choice but to turn it off at night.  Maybe I should add a timer to it.
Rating: 4 stars