I think the first thing you must do when purchasing a
dishwasher is buy a new set of cutlery, plates and cups because every
time you want one they are dirty and in the dishwasher.
One more hassle is you need to
rinse everything well to get a half-decent job as dishwashers do not do as good a job as hand washing. A hand wash has
all the dishes washed and dried and kitchen sink cleaned before a
dishwasher is even a quarter through its cycle.
And, dishwashers do not
give pots and pans nice scrub that they indeed need.