Product review (5 stars): Extremely easy to use and the Humitar sponge holds water for ...
This package at this price is a bargain!  I read lots of reviews before investing in this package but it was well worth it.  I didn't think I would use the Humireader but I check the readings every time I open my guitar case.  Extremely easy to use and the Humitar sponge holds water for a long time compared to others.  I live in the desert and re-wet the sponge with distilled water every week or so.  Use only distilled water in the Humitar.  I love the fact that the Humitar keeps my acoustic guitars within the proper humidity range and that I can verify this on the Humireader.