Product review (5 stars): Great Deal!
This 3-Pack of filters is the way to go!  A filter is supposed to last 6 months, but with our crappy water they last 4 to 5 months depending on the time of year.  Nice to have a couple extra on hand.  Living in a small town, these are frequently out of stock  at our local Lowes.  Price is much better than local pricing.  So....for the price, the ease of ordering, and the fast delivery this is the way we will order filters in the future.  Great Job, Amazon!