Product review (5 stars): Fits just like the OEM LG filter and works great.
Fits just like the OEM LG filter and seems to work just as well - at 1/3 the cost.  Make sure you run a gallon or two through it before using.  That will flush any excess charcoal that might be in the filter from the manufacturing process.

Update 2/4/16 - just bought my second filter, I am definitely sold on these - way less expensive than the OEM and works great.

Update 12/2016 - just bought my 3rd - still a great value!