Product review (2 stars): Great except NOT weather-resistant
The display is easy to read: not busy, nice fonts, soft backlighting.  I think I will mark the four corners of the main display (sharpie?) with each location because I'm the only one in the house that can remember which reading corresponds to which placement. The outside unit is not weather resistant.  I placed under a tree (as suggested on the instructions) tight up against the back of my house that has constant shade.  We had a rain storm and the outside unit kept reading a constant temp and humidity for a few days, so I went to remove batteries and put back in so that it would reset itself and the battery compartment was filled with water.  I let it air dry for a day and when I picked it up again, water was dripping out of the whole unit, so I had to unscrew and take apart the whole unit and let it air dry for few more days.  It seems to be functioning now, however, to have an outside unit that is not weather resistant is not very useful.  I will have to go back to the ones with the wires hanging out my window like the one I had previously (but at least it lasted for 12+ years before the wire became severed).