Product review (1 stars): Only good for 16 sq. feet rooms!
Like the others, I was attracted by the simplicity of the unit.  It made sense on many levels:  an easy to fill tank, rotating disks with a large surface area for evaporative efficiency, and a fan to disperse the water.  I was also wooed by the possibility of minimal cleaning.  After purchasing the unit from BBB, I put it to the test.

I placed the unit on the floor, at the base of my queen-sized bed.  At the head of the bed, I placed a digital hygrometer.  After a week of testing (using the humidifier only at night), I found that the humidity near my head went from 29% to 29%.  Wow, what an amazing rise in humidity!  I found that if I placed the hygrometer a few feet away from the unit, the reading jumped to 40%.  But, there's no way I'm gonna sleep with this thing on my face.  For the second week, I placed the unit on a chest at the base of my bed.  This time the humidity went from 29% to 33%.  Simply astounding!  What a superior product!

As you can tell, I'm not exactly a satisfied customer.  This thing doesn't fulfill the sole purpose I bought it for, to humidify.  I have returned the unit and am now testing an Air-o-Swiss 7142.