Product review (5 stars): ATTENTION:  PLEASE READ REGARDING SEARS, WHIRLPOOL, & PUR
It seems there are a LOT of misuderstandings in these reviews.  If you own a Sears refridgerator it IS a Whirlpool, or Kitchen Aid, or whatever else with a "Kenmore" name plate on it.  Sears doesn't make their appliances and they purchase appliance from varios companys and put their "Kenmore" brand on it.  I have a Whirlpool fridge, Whirlpool dishwaher, and GE microwave.  They all say Kenmore and the stainless stell matches perfectly.  A Sears sales rep will tell you who makes the specific unit.  This is true for Kenmore washers & dryers as well, all appliance.  Secondly, Whirlpool, Kitchen Aid, Kenmore, etc. do not make the filters.  Sears, Whirlpool, etc. sell the filter with their markings on it.  PUR make the filter.  This is not a cheaper replacement for the filter, it is the same filter.  I have been using PUR filters bought on-line for 5 years now and it is the same filter that came in the refridgerator when I bought it.  The only thing to keep in mind is that the "universal PUR Filter", that fits all push button, in the grill units, does not have the same filtration as the the specific PUR filter that comes with the fridge.  For example the "Universal" filter is about $26 on Amazon and my fridge came with a PUR 4396710 which cost about $32 on Amazon.  Both will work, but the $32 unit filters out about 11 types of impurities, the $26 unit is 4 types. I buy the 4396710 to protect my 2 year old and wife.  What is $7 more when it's your family's health.  They are about $50 each at Sears.

I hope this information helps clear up some misconceptions and helps people make an educated decision on what to buy.