Product review (4 stars): but it is very easy to read
It will be awhile before I can determine how accurate this monitor is (though I care more about the trend of the humidity/temperature personally), but it is very easy to read, large legible type, and the color indicator is very glanceable.  It's also easy to setup.  The magnets are a huge plus that make it very easily placed, including the stand which is also magnetically attached.