Product review (2 stars): I am not pleased with these
I am not pleased with these. I wish I was, as the price is fantastic, but they simply don't work nearly as well as the official cartridges.  Our tap water has a distinct brackish flavor which the GE filters eliminate. These honestly don't seem to be doing anything.

I've gone through 3 of my 4 pack in just a few months switching them out in case I had a dud in the mix with no improvement. I have noticed the water pressure at the door is higher, though.  My model fridge is known for being super slow at the door. It's not as slow, making me think water is passing through the filtration much faster.  I've yet to cut one open to verify, but it's almost as if the carbon "egg" is cracked and it's letting unfiltered water right through.