Installation was pretty simple. I LOVE the new design of the large nut/washer used to secure the faucet to the counter top. Given these are always installed in tight quarters working around drain pipes and disposals this made installation much easier than the faucet I was replacing. The quick-connect for the sprayer hose prevented me from retaining my old sprayer which was solid brass and higher quality than the new one. I rated this a 3 because my cartridge was defective and the faucet leaked water around the handle right from the start. I called Moen the next morning and they will send have a new cartridge delivered to my door the following day. Hopefully that solves the problem. .