After initial install we had a leak coming from the center faucet.  After several hours of trying to find the leak we figured out we could dissasemble the stem on the faucet itself and we found a rubber flat washer that was misshapen and out of place allowing it to leak. This had to have come from the factory this way.  I found an approximate replacement for the rubber washer at the hardware store, but the central hole is smaller and now it makes a weird noise because of the restricted flow.   I tried to contact the manufacturer and they only have a web contact from with an address from china.  No response yet from them after 3 days.   Other than that, the faucet is beautiful, the action on the valves feels smooth and nice.