Product review (3 stars): Purchased and installed in April 2015, begin to fail ...
Purchased and installed in April 2015, begin to fail in January 2016.
Initially, the device would cycle the compressor but, finding the right setting (even with a thermometer inside the cabinet) proved tricky. Eventually wound up turning it to nearly zero to prevent freezing of items in the refrigerator side and it 'worked' correctly for several months afterwards.
Now, we are back to point of having to check on it every day and generally have to tap on the thermostat control knob in order to get the compressor to cycle again. The "savings" of about 50% (at the time of purchase) turned out to be of no real benefit as I am back to dealing the original complaint of having to tap then eventually bang on the old control knob (pre april 2015).
Arrggghhhhhh!