Product review (5 stars): CONVENIENT AND MORE ECONOMICAL
Convenient way to purchase refrigerator filters.  Not only is it nice to have them on hand when you need a replacement, but also you get a break in price.  By the way, I tried ignoring my you-need-to-replace-the-filter light when it came on, but eventually it clogged up enough so that I did not get any water or ice.  So now, I don't replace the filter the second it comes on, but I do within a week or so.