Product review (4 stars): Great Value!
To be fair, I'm not a water filtration expert, nor am I regularly testing my water for Ph balance, chemicals, lead, etc. (You can purchase water testing kits online and I believe some retail stores)  However, refrigerator filters can be very expensive and depending on how much you use your filter, will greatly determine how often you replace it.  The warning light on your fridge is set to time, not use...so keep that in mind.  My family uses the water from the fridge daily, so we tend to go through them quickly.  I think every 4 months or so we try to replace them (This could be due in part to careful marketing from fridge/filter manufacturers).  Back to the review.  I really don't have much content to add except that for the price of one filter at a retail store, you get three here.  Great Value!  Also, I have not noticed any taste difference...so I assume the filter is doing its job as designed.  I gave 4 stars because every once in a while, the water spurts or hiccups (as if air is still trapped in the filter or the line), the fridge is brand new and the factory filter never did this.  This spurt or hiccup (best way I can describe it) is only an inconvenience because when it happens, it tends to spray water away from the stream, making a small water mess for me to clean up...With all that said, for what its worth, I recommend this product and I have no reason to not buy from them again.