Product review (5 stars): Works great!
Every time we replace the in our fridge we can tell a major difference.  Depending on your water you can use it longer than 6 months.  You can tell when it needs replaced by the taste usually. We haven't had any problems with these and have used them for 5 years in our fridge.  We did try a generic filter at some point, it did not work as well as the GE ones.