It is a really nice place and the location is perfect for everybody who wants to explore Athen.
Many nice bars and restaurants around and it only takes you 15min to walk to the city.
If you need any advice just ask Dimitris, he will help you out.
Ask him for a driver, he knows a guy who speaks english pretty well and he can let you into the flat. It doesn't cost you anything more than a normal driver. Buy public transport it is not that easy to get to the flat.
If you need a taxi in Athen you should use the "beat" App. It is for free and shows you how much a fair will cost you to your destination.