Classy and substantial.  Once you get used to turning it on and off you wonder how you ever managed without it.  Water flow is activated by one of two methods....you can either pull the spray attachment out of the neck (and the water turns on automatically, and then goes off when you put the hose back into the neck) or you can hold your hand in front of a sensor at the base of the faucet for second (no need to wave) to turn the water on, and then hold your hand in front of the sensor again to switch it off.