Maria's apartment is just perfect - it's super clean, spacious, with enough privacy between the rooms. The furniture is simple, stylish and of very good quality, you don't feel like something might fall apart in your hands just from touching it.
It was only 10 minutes walking to the nearest metro station, 30 minutes to Acropolis, 2 minutes to a good supermarket and 1 minute to an amazing gyros and grill restaurant.
The neighborhood is very quite, so you won't be disturbed at night by neighbours or bars, however be prepared to wake up to a dog barking if you have a too tender sleep ;)
From the Old town it's about 4-5€ by taxi and the same to the Terminal B bus station.
Great apartment for a wonderful price!