Product review (5 stars): Recommend!
These worked as advertised in my humidifier.  The instructions were clear and easy to follow.  I spent most of the time just cleaning up the scale on the top water distribution tray since I had not replaced the water panel since the humidifier was installed in 2010.  Otherwise, the panel was very easy to replace and it has certainly made a difference in the smell that sometimes emanates from the system when it starts up after a period of non-use (like going from summer to fall).

Product was well wrapped and delivered on time.  Recommend!