We had a great stay at Costa and Luciano's. The apartment is very nice, clean and in a quiet neighbourhood while at the same time you are basically right at the city center.
The guys also invited us to join them and a group of friends on a trip to Delphi. We visited the museum and archaeological site with them and ate at a taverna on the way home. Nice place, good food, a lovely view ;-) and an all together good time.