This is the dishwasher we had installed here at my office.  This dishwasher runs EVERY NIGHT, Mon-Fri.  We have 18 employees and usually get it pretty full each day with coffee cups, glasses, lunch plates and leftover containers.  I don't know how long it runs because we always set the delay so it runs after-hours.  We are just now replacing the racks.  It has seen a lot of action since APRIL 2002.  Seven years = 1,820 wash loads and now new racks.  Though we don't require scouring, nor do we load pots or pans, still pretty good for the money, I'd say.