We had a lovely stay in Konstantinos' apartment. The location is great, walking distance from bars, restaurants, the Acropolis, about 15-20 min walk to Syntagma square, 30 min to Kolonaki neignbourhood. The apartment was sparkling clean, very spacious and equipped with all the amenities you need (dishwasher, washing machine, coffee machine, kettle, fridge, etc). The communication was very good and check-in/check-out very smooth. I totally recommend this place.