Maria's place has an awesome view of the entirety of Athens, including the Parthenon. My girlfriend and I spent our two night there drinking wine on the patio and looking at the stars and lights from across the city.
It's off the beaten path from the most traveled parts of Athens by tourists, but a very short Uber or taxi ride away to the central attractions.
The neighborhood is very safe and very walkable. I definitely recommend staying at Maria's place, if you have the chance!