Product review (4 stars): Initial head fake
I went to youtube to see how to install the filter.  You simply unscrew the old one, no need to turn off the water and then gently push up and screw in the new one.  Then my problem.  I couldn't get any water to come thru.  Turns out that the water line had frozen and plugged up the system.  After I turned off the refrigerator for about an hour I tried the filtered water again and it ran flawlessly.  Good filter and I will order again.