Very good experience, Maria's flat is exactly what you can see in the pictures, a 5 minute walk from the nearest train station and a 15-20 minute walk to the city center (you could take the subway, but we chose top walk everywhere). Close to the vibrant neighborhood of La Latina with shops, restaurants and coffees in close proximity, even though the flat is in a side-street and not busy.
The apartment itself is perfect for a couple or a small family, but could also fit two couples if you don't need a lot of space for yourself and are comfortable sleeping on a sofa-bed.
You have to take four steps to get to the apartment (which is on the ground floor).
The flat itself has everything you need - pots, pans, oil, sugar... the bed was very comfortable and Maria even had a babybed.
I definitely recommend Maria's flat to anyone, just try not to spend too much time in the apartment - it's nice outside!