Product review (4 stars): Good buy, but be careful where you put it.
Nice easy to use unit, very sensitive to any kind of direct sunlight. Even when outdoor temps were -8 a few days after getting this, sunlight made it read that it was 9 above zero. Granted due to those extreme cold temps the sensor is only temp mounted for now.  Just be aware of where you put the outdoor sensor and the unit indoors. Any kind of sun throws the readings way off.