Product review (5 stars): We've been using this product (not always the three-pack) for ...
We've been using this product (not always the three-pack) for a few years now.  They are less than a quarter of the price, but equal in quality (we had water tested).  Only once in the last four years, we had a filter that limited the water flow.  We switched it out with another filter and the flow was normal again.  For less than 9 bucks per filter in a 3 pack compared to almost $50 for the GE original, we weren't going to complain too hard.