Product review (3 stars): Not Very Good! But having a working part for 4 years ...
Can't give it any more than a 3. I've had the refrigerator for 12 years. This is the  second time I've replaced the part. Within some 4 years or so my freezer started icing up, not defrosting and ultimately shutting down. After that I spent perhaps 3 or 4 years of emptying out my refrigerator and freezer, shutting it off and allowing it to  defrost every 6-9 months. Then I decided to get adventurous and examine the freezer. Found out how to replace the defroster and decided to give it a shot. It's worked. However this will be the 3rd defroster that has been in it: the original and the 2 replacements. Given that I went thru a period of at least 4 years manually defrosting, the part only lasts about 4 years. Not Very Good! But having a working part for 4 years beats having to self-defrost every 6-9 months. So just an average rating at best.