Product review (5 stars): Better than cheap ones out there
Though Whirlpool advertises this to be changed every few months, per experts you have to change when your water flow reduces drastically or the water tastes funny. With those parameters, each filter lasts at least a few years for me. Also, the original filters filter more (including led) than cheap ones out there. It was a very easy decision for me to buy this over the cheaper ones.