His page links to a YouTube review of the Bob where the reviewer claims that it gets things cleaner than it's possible to do by hand, especially irregularly shaped items like electric grill parts. And yes, the dishwasher uses at most 3L, while he estimated sink washing used 10L, not including the 1 min. of running water wasted waiting for the hot water to arrive.
Yes, that was my first impression with dishwasher many years ago. It is plain impossible to achieve this quality with hand washing. Especially for glassware.
