Product review (1 stars): They work....for a couple ounces and then slow to a trickle.
We've had nothing but problems with these filters.  They dispense about 6-8 oz of water at normal flow and then drop to a trickle.  If you want a glass of water larger than 8 ounces, it takes a few minutes.  I tried all the recommendations found on the website and actually READ the instructions!
 Nothing seemed to help.  After a few months of frustration I decided to try another one in the three-pack.  It does the same thing.  We finally gave up and ordered a GE OEM filter and popped it in yesterday.  Just like that....full flow water for as long as you hold the button down.  I usually don't mind aftermarket items but in this case....OEM all the way!