The 500 series does a great job cleaning and drying the dishes, etc.  Also, it is very quiet.  The probllem is that the interior design makes it very difficult to load everything other than dishes.  Bowls, mugs and glasses have a very limited space for loading.  I have to run the dishwasher twice as much as our previous dishwasher.  The worst thing is that it only comes with a very small silverware rack.  It is literally 1/2 the size of others.