I highly recommend Konstantina's house for your stay in Athens ! it is SUPER clean and full equipped. As a host, konstantina is very reactive and useful (she gave us some tips about Athens and we had food when we arrived, which was very nice after a day of travelling). On the first day, we went to the Acropolis by walking, it is do-able but I won't recommend it as it's quite long and the way to go is not so nice... It's better to go by metro, which is 15mns direct from Konstantina's flat !