Stayed a couple of nights. The location is superb, only a couple of stops from the central Metro stations in Athens and home to some legendary restaurants (Mavros Gatos is a must visit). The crowning glory of the flat is Konstantinos himself, one of the best hosts we have had the pleasure of meeting. He stayed up till 10 PM for a late check in, stocked up the fridge with some delicious fruits and was helpful all the way through to checkout. Very highly recommended for a business solo traveller / couple.