5 years and we loved our 2007 Whitehaus 501 - sold the house last fall and it's still going strong for the new owner. We are relatively careless sink users, flinging about castiron skillets, etc, and as of the time we sold, the sink only had one tiny chip in the front caused by a workman dropping an electric drill on it. No crazing or cracking, and we dumped hot boiling pasta water into it all the time.

From our experience, A++.