Product review (5 stars): Works great and lower price too!
Love these!  So simple to replace and last about 90 days.  I guess it all depends on how much water and ice you are using.  We purchased the three pack to save a little money and not have to sit and look at the red light on the front of the fridge next time it needs a filter.  Good quality and the water and ice taste a lot better than the tap water.  We have very hard water here and I believe these help and the three pack is a money saver.