The most important things is to make sure the tub is stainless steel. Not a mix, all stainless (the outer shell can be whatever) . The detergent (what really ge

The most important things is to make sure the tub is stainless steel. Not a mix, all stainless (the outer shell can be whatever) . The detergent (what really gets stuff clean) is super nasty and will eventually eat the plastic. That being said, next look at the brand. I have a Bosch and its great, super silent. If you hear a noise, you loaded your dishes too tightly and they're banging against each other.