The accommodation is consistent with the description, big studio with double bed, a sofa bed and a nice cuisine area. If you don't mind a little walk, there is no need for taking the subway. The apartment is 20 minutes walk from the main sights, for example, the acropolis and the Plaka district.
The only downside I remember is the bed : not very wide and squeaks every time you move. But, for all the rest, it was perfect.