I have had my dishwasher for around 1 year now and after 4-5 washes it has a terrible odor. We have to use that special dishwasher cleaner about every 5 washes to tolerate the odor.
I own three Samsung appliances: Refrigerator, Gas Stove/Oven and Dish Washer. I have the infamous ice maker issue with the refrig where I have to defrost and chip ice out every 4-5 weeks.
At this point I will never by another Samsung product.