Product review (5 stars): Great Value and Works Perfectly Out of the Box
If you just want basic indoor and outdoor temperatures (plus humidity) then this model does the job at a cheap price-----and easy to set up. I just received this 08/27/2016 and it operated perfectly out of the box.  The only installation steps are to (1)  insert 2 AA batteries in the remote sensor (first), (2) insert 2 AA in the base (next), and (3) hang the remote and base.  The base unit screen has a large monochrome display that is easy to read as long as there is some ambient lighting in the room.  The base unit screen is not back lit and doesn't really have to be since even minimal lighting is sufficient to read the display.

As to the complaints concerning inconsistent readings between the remote sensor and the base when they are in the same location:  if this occurs immediately after they have been removed from the product packaging or from any other enclosed container/drawer then this is not a flaw or an indication the product is not functioning properly.  The base and remote sensor both need free airflow to operate correctly.  Usually within an hour or less of free airflow the temperature readings will stabilize and become accurate.

The written directions give guidance as to remote sensor placement outside (continuous shade and at least 5' above ground level), but doesn't indicate a potential problem with the remote sensor being completely open to the elements.  While the device is not intended to be immersed in water I tend to agree with other reviewers that to extend the life of the remote it might be best to place it somewhere with at least some minimal overhead cover from direct rain and snow.  My remote sensor is outside (and adjacent to the house) and it had no problem with radio contact with the base.  I did not test the range for reliable contact with the base unit.

Both the base and remote have wall mounting keyholes and the base comes with a detachable base for placement on a desk or table.  You'll have to trust others concerning long term reliability, but out of the box it is more than worth the money.