We installed this several months ago and we love it!  It's a workhorse and is so quiet.  When it's operating, it has this red light which illuminates on the floor.  This is wonderful for us so we know it's running.  Just love our Bosch so much - we put all Bosch appliances in our kitchen : Microwave, Gas Cooktop, Double Oven with right opening door (we no longer burn ourselves removing food).