I have had this faucet for 4 years now.  The cartridge is smooth as silk.  The entire faucet looks like brand new. The magnetic docking works great as long as your hose retracts correctly.  I only wish the sweep spray would revert to the regular stream when you turn the faucet off.  I had to learn to do that each time.  2 days ago the hose started leaking just above the swivel where it connects to the spray head.  I called customer service and dealt with Danielle who was prompt, courteous and efficient.  My new hose is on the way under warranty.