Product review (5 stars): Increased flow rate over the original, make sure and flush a gallon of water through prior to your initial cup to drink.
Better than the original in my Whirlpool fridge.  This one only lasts 6 months or 200 gallons, but sports an increased flow rate from .5 gpm to .75 gpm if I remember correctly.  The size of the hole at the top was enlarged to handle more flow.

A few suggestions:  1) I like to put some water in it prior to installing.  Just a personal preference.  2) After installing, push a gallon of water through the filter to get rid of the initial taste.

I usually push these past their expected lifetime.  The water in my area isn't too hard so the filters can last longer depending upon your circumstances.  When I taste a slightly odd flavor in the water I swap it with a new one.