This apartment is all about location and value and if you're looking for a place in the center of Athens within walking distance of all major attractions then, Maria's flat is it.
Before choosing to stay here I did read the negative reviews as reviews mentioning the noise late at night coming from the local square cafes. Yes, the noise is there, but with the balcony closed it didn't affect my sleep at all. The shower is a bit small, but again, wasn't a problem for me and won't be a problem for most people.
Just remember that there is no washing machine available as of the time of this review.
Nearest metro station is a 10 minute walk with luggage. There are trolley and bus stations 2 minutes from the apartment as well.
Overall, I would chose Maria's flat again for its location and value.