Product review (2 stars): Hello I'm a refrigeration and Air conditioning Student I also ...
Hello  I'm a refrigeration and Air conditioning Student I also fix appliances on a part time basis.
I was once on  Hacker Trade show where Supco was a vendor I talked to one of the reps there and he swore that this devices help and prolong the compressor life time.
I replaced the start overload on my own fridge with a supco hard start kit and after a year and half, the compressor went South, Done, no mas
I went this route to install this device because it was very inexpensive and all the reviews I heard.
Please don't make the same mistake.  Spend little more on the Original OEM replacement part  that in my opinion your compressor will work way longer and more efficiently.