Choose a slim model dishwasher if you have a small family or less than average dish-washing needs. For example, a tall-tub or standard dishwasher might take longer to fill up, forcing you to run half-empty loads just to clean the dishes you need. Because some tall-tub dishwashers are designed to accommodate larger pieces of dinnerware or cookware, the racks might have wide tines, causing small plates, bowls and cups to shift and rock during the wash cycle. Lastly slim tub dishwashers are a practical and cost-efficient option if you have less than 24 inches in width available in your cabinet opening.