Kosta's apartment is really cute. It is located in a very central area and about 15 minutes walking to reach the Acropolis. The area is safe and there are many places where you can eat at a reasonable price. The apartment has Wifi and the kitchen has everything you need to prepare a meal. I would definitely stay in Kostas apartment again, he was always in touch with me and if you have any questions, just send him a message and he will respond you quickly.