Product review (5 stars): Finally a unit that WORKS!
I tried another analog humidity meter before settling on this one.  The analog unit never worked correctly and showed 70% humidity no matter where I had it in the house.  So I decided to use a digital meter instead.  It was setup within seconds and took about 30 minutes to adjust the humidity reading to the room.  It has worked great ever since.  It is a great display because it shows you the relative humidity, the temperature, and the dew point.  I use this in my basement to make sure my dehumidifier is working correctly.