We managed to break the "pivot retainer" a cylindrical piece of plastic which sits under the kitchen sink handle. After 15 years I wasn't all that surprised. The faucet was still usable but leaked when off (probably not unlike some of us older owners!
) Anyway, fortunately I had all the model information (the previous owner of my MH was a gem) and one phone call to Moen got the parts on their way to me. Since we weren't going to be in one place for very long for the next couple of weeks, I had them overnight the parts for $20, otherwise they would have been free.
Installing the piece was easy and the CSR sent some additional parts which she felt would improve the "feel" of the handle. The entire repair took less than 20 minutes. It's worth noting that Moen parts don't seem to be all that available at Lowes and HD, probably because they can be obtained so easily from the company.
IMHO this is a great way to establish lifelong customer relationships. The part, a piece of molded plastic probably cost a penny or two to make. Sending it to me for free rather than charging me even $5 was a great way to cement a relationship with a customer. If I ever need a new faucet, guess what brand I'll buy?