i have had a moen kitchen faucet with a pull-out sprayer for approx 8 years and it has been wonderful. So far i have not needed to change the cartridge. In my upstairs washroom i replaced old shower fawcets with a single armed moen shower faucet and other than one washer change, it has been working well for over 15 years.I have been very please with moen. And, when i had reason to call customer service (many years ago), they were very pleasant and told me that they will provide me with a free cartridge provided that they can pick up the old one.