I purchased a Sienna Tavole stainless steel faucet with the sink last year. The plastic knob on the pull-out spout bleeds black stuff all over my hands when it gets wet. I have called the company and left messages. I have sent emails and filled out there contact me request. Have gotten no response from the company. They guarantee a lifetime warranty but good luck being able to get them to respond to a complaint. What good is a warranty when all they do is ignore you when you have a problem.