We chose the apartment because it looks clean, simple, uncluttered and modern, which it is. Good to have a second bedroom although it is small and can be rather cramp. Also great to have a second toilet and shower so we don't need to have to wait for each ochre to shower!
There is noise coming from the cars/motorcycles on the road as the apartment is low floor but thankfully it is a rather minor road so you get car sounds only occasionally. The main problem is with the air-conditioning, we think it either work in the living room or the bedroom, and not all rooms. So it can be hot even when we put it at 16 degree. The pillows and beds can be better too. In terms of location, its ok, but the area is rather quiet and have to walk a little out to find supermarket and eating places.
Otherwise, the host, Konstantinos is friendly and he tries to help out with our requests when we moved from Monastiraki to this apartment in Kolonaki. On the trip to the airport however, we were told of a high charges of 90 euro to get a car transfer, which of course we have to reject. Its not our host's fault, but will be good if he can have on hand reliable airport/car transfers services to help with customers leaving for the airport, especially when we have 3 huge luggages and one taxi may not be able to accommodate.