Product review (5 stars): The first day
Easy to install, fit perfectly. I have an older Kenmore Elite (I don't know the model # )

 As soon as I installed, like the next day, a different component to our refrigerator water system broke.  Having nothing to do with the filter.  So I can't state to the longevity of the water filter.  But that first day! Ohhh man I could really taste the difference in the water.  It was fantastic.  Our tap water tastes horrible, we just moved into a new home.  I was so excited to finally be able to drink our tap water.  Then BLAM! A gasket broke and if we try to use the refrigerator water it leaks every where into our fridge. *sigh*  But that first day, I didn't taste any of the minerals that I could taste in our tap.