The view is breathtaking, i wont spoil anything tho. The hosts are amazing, really friendly, responsive and willing to help in every possible way. There is easy access to the red line of the metro and the place is only 3 stops from the very center of the city! There is also easy access to the tram (but its not very useful in the case of Athens, unless you want to see the coast). The flat is spacious, clean and stylish. There is a cute surprise in the bathroom waiting for you :). Definitely value for money. Enjoy your stay!
The only thing i should note is that the tram makes considerable noise, but for active travelers that crave to explore the city this wont be any problem as they will be outside most of the time!