Product review (5 stars): Easy to install, no problems, great for the price
I installed a filter 15 years ago behind my refrigerator, and never touched it again because I knew it was going to be a pain.  But, I finally decided to address it, and this is what I chose.  I like the price, the brand, and installation was easy.  I also purchased a PEX tube assembly to make the installation easier, and although this apparently shuts off when you change the filter, I installed a little shut-off valve and installed it just before the inlet, just to be safe.  I mounted it the back of a cabinet next to the refrigerator, and now I can change the filter in 1 minute instead of 15 years.

The filter itself was well documented in terms of effectiveness.  Also, if this filter does not address the situation, there is a different cartridge that uses the same mounting system.  The other filter is more expensive and will not last as long, but it works on the more difficult water issues.