A maid can do lots of stuff!!!!!!!! 
She
can sweep, mob, iron, wash, cook and a whole lot more! No robotic
cleaner can ever be compared to a maid. Of course, if you have the
budget and accomodation for the maid, then by all means get the
maid.
A robotic vacuum cleaner is more for those w/o a maid at home,
spare you the routine daily chore and keeps the floor clean. If you
have kids in the house dirtying the floors with food and stuff,
then this will also be very handy. If your family is going on a
short vacation, you can be sure that this little guy will keep the
floors clean while you are away. As its able to go into places
(underneath beds, furnitures, etc.) which you may not reach
everytime, the cleaner can prevent dust and dirt from building up
in these hard to reach places. In fact, it actually does a better
job than manual sweeping/vacuuming! 
