I purchased the Contour as a replacement of a different brand, which failed, instant hot water tank. Installation was very easy, with good instructions to follow. I had to purchase one connector to connect water supply line, but all other required hardware was included in the box. My concerns regarding appearance were not realized as it fit the previous holes perfectly. My wife loved the finished project and remarked " It definitely raises the appearance of the sink area." So if momma is happy, I'm happy.