It is a very nice looking and overall well-functioning faucet.  Sometimes you need to tap it a couple times to get it to start or stop.  Also, every once in a while when you turn it off it will turn itself on and off again a few times and we typically then just turn it off manually.  The worst thing about it is the 'CLUNK' noise the valve makes when it shuts off.  For such an otherwise well-engineered (and expensive) product, it is disappointing.  There has to be a way to design a valve that closely more quietly.