Well, I'm new to all this. we just bought our house about 6 months ago. And i just had the displeasure of dealing with Moen for the first time. Our shower temp selection handle completely broke off with part of the moen cartridge stuck in it. We managed to get that out so we could find a part number, bought the part for $35, and the cartridge puller for 30. So $70 bucks when all was said and done, we could have bought a whole new shower kit for that, i discovered later. Got home and couldn't use the puller bc the part it threads on to was broken off. We managed to twist it once with the plastic piece the part came with, which took 2 of us about 25 minutes. It still wouldn't come out, it was hopelessly stuck and we had no way of pulling on it, twisting wasn't doing anything but breaking the plastic. I finally thought to use a couple of self tapping screws and screw them in to the plastic of the cartridge to give us something to pull on which helped considerably, no way it'd have come out without that. It still took 3 of us another 45 minutes to get it out. The seals were totally stuck and ripped on the way out.
I had a little hope when the employee at home Depot told me that moen had a lifetime warranty, and since my moen kitchen faucet has been leaking like a sieve, I figured I'd give them a call. They first informed me that we weren't covered by their warranty because we aren't the original buyers, and that the parts for my sink would be another $46. And they could get them to me in 2 weeks! So I asked if the new parts we were buying and had recently bought would be covered by that awesome lifetime warranty? Nope, because we didn't buy the original assembly in the first place, these are just considered replacement parts and "you'll always have to pay to replace the parts that break" this house was just built in 2005 and I've had 2 moen parts go out so far. When we remodel, I'm not going for moen, that's for sure.