Professional is what we got. We were a family of 5 adults and 1 baby. We had all the arrangements for the baby with a crib and a baby chair. The floor was cleaned spotless - our baby was walking barefoot and there was no sign of dirt :)
There was instant communication with the apartment owners via the AirBnB that was very helpful for arranging check in and check out. As for the location if you don't know Athens, this is the best spot to be in Kolonaki which is the most chique place with great cafes and restaurant while at the same time being in any central place (parliament, syntagma square, Cycladic museum, Abenaki museum, etc) in just 5 min