Product review (5 stars): This is the real LG filter replacement.
This is the legitimate, LG filter for their terrific refrigerators.  Packaged nicely, snapped right in.  It does NOT come with directions, so word of caution: when you FIRST use the water dispenser, have a large container under it.  The installation of a new filter will cause the water dispenser to "flush" itself.  I was not aware of this (shame on me for not reading the manual) and it was quite a surprise. After a flush or two, it worked just fine.