This is probably the best appliance purchase I ever made! Overall build quality is high and excellent. The dishwasher is so quiet, barley can hear it running and at times I would have to look at the red light indicator to confirm it's running. Not having a heating element inside gives me confidence that my plastics are not going to warp or get damaged. The dry cycle and autodry mode (releases the door) to allow moisture to leave and air dry your clean dishes ensures your dishes to be dry. The third rack is nice to have and I love the versatility and adjustability of all the racks allow all different types and size of dishes to be cleaned. The tub inside, including the bottom, in the 500 series is all steel which is nice and does not retain any funky smell. No regrets to this purchase.