Product review (5 stars): An amazing product
Do not listen to naysayers online.  Our fridge quit on us right at the beginning of summer, and instead of paying a repairman or looking for a new one, I thought I'd give this little device a try.  Amazing.  The refrigerator runs like new again.  If your refrigerator quits and you want to look uber-competent for your wife, buy this and install it.  It works.  The problem with the original part is that it plugs in directly onto the side of the compressor, and the years of heat make the inside of the switch brittle (mine sounded like a baby rattle when I pulled it off from all the broken pieces inside).  This has nice long wires that will allow you to tuck it into a space away from the compressor and the life-shortening heat coming from it.  You won't be disappointed.