Kostas flat is a very good place to stay in Athens! . The location is very near to all places you have to go in Athens, just take the trolleys 1,5 or 15 to go directly to Syntagma square. Of course I spent more time outside than inside the flat but when you come home it is comfortable, practical and clean.
Kostas is very friendly and helpful.. He is able to solve any problem within a very short time and that counts in a foreign country where you (unfortunately) don’t understand the language. Trust on Kostas!