Product review (5 stars): You have to watch the water level but it's easy to pour water in on the top
It works.  You have to watch the water level but it's easy to pour water in on the top.  A couple of reviews complain about the cheap quality.  It's about what you'd expect for $15, especially w/the ducting.  And you're not using it all the time, just opening and closing the top now & then.