Product review (1 stars): RM WI
Received filter in timely manner.  However, upon installing it there was a strong stale odor that of course got blown throughout the room so I had to take it out.  My humidifier is relatively new and quite clean and clearly the filter was the source of the smell as when I took it out it went away (but stayed with the filter when I tossed it).  It's possible I got a bad one but I will not be buying this product again.