Product review (5 stars): These work well and last a long time.
These work well. We have been in our house 2 years and I think we have replaced the filter 3/4 times (our fridge tells us when to do it), they do last a long time.  Also, if your water dispensing has slowed way down it is time to replace your filter.  I am always amazed how much faster the water runs through with a new filter.