Product review (5 stars): If you have never changed your own refrigerator water filter ...
If you have never changed your own refrigerator water filter, trust me, it's a piece of cake.  The water cuts off when you unscrew the filter cartridge, so you don't have to turn the water off.  I dated mine with a Sharpie pen to help me remember when to change it.  Note the front of the old cartridge before you remove it, so you know where to write the installation date.