Product review (5 stars): Cost Is the Only Real Factor and This Is a Bargain
Reviewing this product is a bit difficult in that my LG refrigerator requires it. Consequently I will focus on the only factor that matters--cost! You can buy this directly from the manufacturer, but they charge significantly more. So there is definitely a savings.  Your savings is even greater if you purchase the 3-pack currently offered through amazon.com.

A third option would be to purchase the aftermarket replacement filter by Kleen Water also sold through amazon.com. Your savings is even greater going this route. (Note: I have never had a bad experience with aftermarket parts for appliances, and I will definitely go this route with my next purchase!)

As far as the product itself, it was super easy to install (LG has a how-to video posted on YouTube) and it is working just fine.