[sightmost]

I got one for my parents so they don't have to do dishes anymore. While my original thought was to free them from something they have been doing for years, I must say I am surprised with the performance.

Definitely no need to pre clean like others have pointed out (I believe the dishes are steamed/heated before the cleaning cycle so the heat takes care of the heavy grease and stuff).

Uses less water, about 10 liters/ 2.5 gallons per cycle.

May be I am taking a high ground here, but why do you want spend time doing dishes if you could afford a Dishwasher? Do something better?

Overall, I would say a Dishwasher would be useful even for a family of 2.